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ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305

Closed
#8708
Closed
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
#8708
Assignees
jacekradko
Labels
backendbugSomething isn't working

Description

@gyulavoros
gyulavoros
opened on Apr 14, 2026

Preliminary Checks

Reproduction

https://github.com/gyulavoros/clerk-body-issue

Publishable key

pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA

Description

ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.

When called as new ClerkRequest(request) (the common path from authenticateRequest):

const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.

When this matters:

In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".

Reproduction:

Create a Hono app with clerkMiddleware() applied globally
Add a POST route that reads req.json() or req.formData()
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
POST to that route → "Body already used"

Suggested fix:

ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:

super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

Environment

System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8

Metadata

Metadata

Assignees

Labels

backendbugSomething isn't working

Type

No type

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    Milestone

    No milestone

    Relationships

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    No branches or pull requests

    Issue actions

    , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
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observer.observe(document.body, { childList: true, subtree: true });
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} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
    Skip to content
    ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
    Closed
    #8708
    Closed
    ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
    #8708
    Assignees
    jacekradko
    Labels
    backendbugSomething isn't working
    Description
    @gyulavoros
    gyulavoros
    opened on Apr 14, 2026
    Preliminary Checks
    Reproduction
    https://github.com/gyulavoros/clerk-body-issue
    Publishable key
    pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
    Description
    ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
    When called as new ClerkRequest(request) (the common path from authenticateRequest):
    const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

    This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
    When this matters:
    In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
    Reproduction:
    Create a Hono app with clerkMiddleware() applied globally
    
Add a POST route that reads req.json() or req.formData()
    
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
    
POST to that route → "Body already used"
    Suggested fix:
    ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
    super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

    Environment
    System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
    Metadata
    Metadata
    Assignees
    Labels
    backendbugSomething isn't working
    Type
    No type
    Projects
    No projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
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.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
      Skip to content
      ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
      Closed
      #8708
      Closed
      ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
      #8708
      Assignees
      jacekradko
      Labels
      backendbugSomething isn't working
      Description
      @gyulavoros
      gyulavoros
      opened on Apr 14, 2026
      Preliminary Checks
      Reproduction
      https://github.com/gyulavoros/clerk-body-issue
      Publishable key
      pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
      Description
      ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
      When called as new ClerkRequest(request) (the common path from authenticateRequest):
      const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

      This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
      When this matters:
      In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
      Reproduction:
      Create a Hono app with clerkMiddleware() applied globally
      
Add a POST route that reads req.json() or req.formData()
      
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
      
POST to that route → "Body already used"
      Suggested fix:
      ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
      super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

      Environment
      System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
      Metadata
      Metadata
      Assignees
      Labels
      backendbugSomething isn't working
      Type
      No type
      Projects
      No projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
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found = true;
var frag = document.createDocumentFragment();
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parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
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var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
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mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
        Skip to content
        ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
        Closed
        #8708
        Closed
        ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
        #8708
        Assignees
        jacekradko
        Labels
        backendbugSomething isn't working
        Description
        @gyulavoros
        gyulavoros
        opened on Apr 14, 2026
        Preliminary Checks
        Reproduction
        https://github.com/gyulavoros/clerk-body-issue
        Publishable key
        pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
        Description
        ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
        When called as new ClerkRequest(request) (the common path from authenticateRequest):
        const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

        This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
        When this matters:
        In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
        Reproduction:
        Create a Hono app with clerkMiddleware() applied globally
        
Add a POST route that reads req.json() or req.formData()
        
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
        
POST to that route → "Body already used"
        Suggested fix:
        ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
        super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

        Environment
        System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
        Metadata
        Metadata
        Assignees
        Labels
        backendbugSomething isn't working
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
          Skip to content
          ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
          Closed
          #8708
          Closed
          ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
          #8708
          Assignees
          jacekradko
          Labels
          backendbugSomething isn't working
          Description
          @gyulavoros
          gyulavoros
          opened on Apr 14, 2026
          Preliminary Checks
          Reproduction
          https://github.com/gyulavoros/clerk-body-issue
          Publishable key
          pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
          Description
          ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
          When called as new ClerkRequest(request) (the common path from authenticateRequest):
          const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

          This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
          When this matters:
          In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
          Reproduction:
          Create a Hono app with clerkMiddleware() applied globally
          
Add a POST route that reads req.json() or req.formData()
          
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
          
POST to that route → "Body already used"
          Suggested fix:
          ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
          super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

          Environment
          System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
          Metadata
          Metadata
          Assignees
          Labels
          backendbugSomething isn't working
          Type
          No type
          Projects
          No projects
            Milestone
            No milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
            Skip to content
            ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
            Closed
            #8708
            Closed
            ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
            #8708
            Assignees
            jacekradko
            Labels
            backendbugSomething isn't working
            Description
            @gyulavoros
            gyulavoros
            opened on Apr 14, 2026
            Preliminary Checks
            Reproduction
            https://github.com/gyulavoros/clerk-body-issue
            Publishable key
            pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
            Description
            ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
            When called as new ClerkRequest(request) (the common path from authenticateRequest):
            const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

            This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
            When this matters:
            In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
            Reproduction:
            Create a Hono app with clerkMiddleware() applied globally
            
Add a POST route that reads req.json() or req.formData()
            
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
            
POST to that route → "Body already used"
            Suggested fix:
            ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
            super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

            Environment
            System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
              Skip to content
              ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
              Closed
              #8708
              Closed
              ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
              #8708
              Assignees
              jacekradko
              Labels
              backendbugSomething isn't working
              Description
              @gyulavoros
              gyulavoros
              opened on Apr 14, 2026
              Preliminary Checks
              Reproduction
              https://github.com/gyulavoros/clerk-body-issue
              Publishable key
              pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
              Description
              ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
              When called as new ClerkRequest(request) (the common path from authenticateRequest):
              const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

              This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
              When this matters:
              In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
              Reproduction:
              Create a Hono app with clerkMiddleware() applied globally
              
Add a POST route that reads req.json() or req.formData()
              
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
              
POST to that route → "Body already used"
              Suggested fix:
              ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
              super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

              Environment
              System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
              Metadata
              Metadata
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              backendbugSomething isn't working
              Type
              No type
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              No projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments · Issue #8305 · clerk/javascript · GitHub
                Skip to content
                ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments #8305
                Closed
                #8708
                Closed
                ClerkRequest constructor consumes request body, breaking downstream body reads in non-native Request environments#8305
                #8708
                Assignees
                jacekradko
                Labels
                backendbugSomething isn't working
                Description
                @gyulavoros
                gyulavoros
                opened on Apr 14, 2026
                Preliminary Checks
                Reproduction
                https://github.com/gyulavoros/clerk-body-issue
                Publishable key
                pk_test_bmF0aXZlLXBob2VuaXgtODcuY2xlcmsuYWNjb3VudHMuZGV2JA
                Description
                ClerkRequest's constructor in packages/backend/src/tokens/clerkRequest.ts transfers the request body when it only needs headers and cookies.
                When called as new ClerkRequest(request) (the common path from authenticateRequest):
                const url = typeof input !== 'string' && 'url' in input ? input.url : String(input);
super(url, init || typeof input === 'string' ? undefined : input);

                This resolves to super(urlString, request), which passes the entire Request as init. The Request constructor reads init.body and transfers the ReadableStream, leaving the original request's body locked/consumed.
                When this matters:
                In runtimes where the Request body is a native buffered object (Bun.serve, Cloudflare Workers), the body survives the transfer. But when the body is a standard ReadableStream — as is the case in Node.js-based dev servers like Vite — the transfer consumes it. Any middleware or handler downstream that reads the body (e.g. tRPC, form handlers) gets "Body already used".
                Reproduction:
                Create a Hono app with clerkMiddleware() applied globally
                
Add a POST route that reads req.json() or req.formData()
                
Run through any Node.js-based server (Vite dev server, Express adapter, etc.) where the Request is constructed from an IncomingMessage with a ReadableStream body
                
POST to that route → "Body already used"
                Suggested fix:
                ClerkRequest only uses headers and cookies — it never reads the body. The constructor should avoid transferring it:
                super(url, init || typeof input === 'string' ? undefined : { method: input.method, headers: input.headers });

                Environment
                System:
OS: macOS 26.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 331.73 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.7.0 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/node
npm: 11.5.1 - /Users/gyulavoros/.nvm/versions/node/v24.7.0/bin/npm
pnpm: 10.33.0 - /opt/homebrew/bin/pnpm
bun: 1.3.12 - /Users/gyulavoros/.bun/bin/bun
Browsers:
Chrome: 147.0.7727.56
Firefox: 133.0
Safari: 26.3.1
npmPackages:
@clerk/hono: 0.1.11 => 0.1.11 @vikejs/hono: 0.2.0 => 0.2.0 @vitejs/plugin-react: 5.1.4 => 5.1.4 hono: 4.12.4 => 4.12.4 react: 19.2.4 => 19.2.4 react-dom: 19.2.4 => 19.2.4 vike: 0.4.257 => 0.4.257 vike-react: 0.6.20 => 0.6.20 vite: 8.0.8 => 8.0.8
                Metadata
                Metadata
                Assignees
                Labels
                backendbugSomething isn't working
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions