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A security team from one of our partners noticed an issue in Next.js that allowed for an open redirect to occur.
Specially encoded paths could be used when pages/_error.js was statically generated allowing an open redirect to occur to an external site.
In general, this redirect does not directly harm users although can allow for phishing attacks by redirecting to an attacker's domain from a trusted domain.
We recommend upgrading to the latest version of Next.js to improve the overall security of your application.
How to Upgrade
We have released patch versions for both the stable and canary channels of Next.js.
To upgrade run npm install next@latest --save
Impact
Affected: Users of Next.js between 10.0.5 and 10.2.0
Affected: Users of Next.js between 11.0.0 and 11.0.1 using pages/_error.js without getInitialProps
Affected: Users of Next.js between 11.0.0 and 11.0.1 using pages/_error.js and next export
Not affected: Deployments on Vercel (vercel.com) are not affected
Not affected: Deployments withpages/404.js
We recommend everyone to upgrade regardless of whether you can reproduce the issue or not.
How to Assess Impact
If you think sensitive code or data could have been exposed, you can filter logs of affected sites by // (double slash at the start of the url) followed by a domain.
What is Being Done
As Next.js has grown in popularity and usage by enterprises, it has received the attention of security researchers and auditors. We are thankful to Gabriel Benmergui from Robinhood for their investigation and discovery of the original bug and subsequent responsible disclosure.
We've landed a patch that ensures path parsing is handled properly for these paths so that the open redirect can no longer occur.
Regression tests for this attack were added to the security integration test suite
We have notified known Next.js users in advance of this publication.
A public CVE was released.
We encourage responsible disclosure of future reports. Please email us at security@vercel.com. We are actively monitoring this mailbox.
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Bumps next from 7.0.3 to 11.1.0.
Release notes
Sourced from next's releases.
... (truncated)
Commits
ce4adfcv11.1.0092a476v11.0.2-canary.31ebb6a30Revert "Add warning duringnext buildwhen sharp is missing (#27933)"52486cev11.0.2-canary.308ac3254Revert "Next swc publish flow (#27932)"6014b6ev11.0.2-canary.294cd45aaAdd rootDir setting to eslint-plugin-next (#27918)e61ea6fAdd manifest check step and add missing items (#27934)94fc6f0Next swc publish flow (#27932)51a2a02Add warning duringnext buildwhen sharp is missing (#27933)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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@dependabot rebasewill rebase this PR@dependabot recreatewill recreate this PR, overwriting any edits that have been made to it@dependabot mergewill merge this PR after your CI passes on it@dependabot squash and mergewill squash and merge this PR after your CI passes on it@dependabot cancel mergewill cancel a previously requested merge and block automerging@dependabot reopenwill reopen this PR if it is closed@dependabot closewill close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually@dependabot ignore this major versionwill close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)@dependabot ignore this minor versionwill close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)@dependabot ignore this dependencywill close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)@dependabot use these labelswill set the current labels as the default for future PRs for this repo and language@dependabot use these reviewerswill set the current reviewers as the default for future PRs for this repo and language@dependabot use these assigneeswill set the current assignees as the default for future PRs for this repo and language@dependabot use this milestonewill set the current milestone as the default for future PRs for this repo and languageYou can disable automated security fix PRs for this repo from the Security Alerts page.