chore(dependencies): update dependency nanoid to v3.3.12 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
nanoid	3.1.20 → 3.3.12

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Exposure of Sensitive Information to an Unauthorized Actor in nanoid

CVE-2021-23566 / GHSA-qrpm-p2h7-hrv2

More information

Details

The package nanoid from 3.0.0, before 3.1.31, are vulnerable to Information Exposure via the valueOf() function which allows to reproduce the last id generated.

Severity

• CVSS Score: 5.5 / 10 (Medium)
• Vector String: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-23566
• https://github.com/ai/nanoid/pull/328
• https://github.com/ai/nanoid/commit/2b7bd9332bc49b6330c7ddb08e5c661833db2575
• https://gist.github.com/artalar/bc6d1eb9a3477d15d2772e876169a444
• https://snyk.io/vuln/SNYK-JS-NANOID-2332193
• https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html
• https://lists.debian.org/debian-lts-announce/2025/01/msg00006.html
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2332550
• https://github.com/advisories/GHSA-qrpm-p2h7-hrv2

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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nanoid: Integer Overflow or Wraparound

CVE-2026-73086 / GHSA-xwg4-73v4-xw9w

More information

Details

Summary

An integer overflow in nanoid(size) permanently corrupts the process-wide CSPRNG pool, causing all subsequent ID generation to return the deterministic string "uuuuuuuuuuuuuuuuuuuuu". Any application that passes user-influenced values to the size parameter loses all randomness guarantees for session tokens, CSRF tokens, and unique identifiers until process restart.

Details

nanoid() at index.js:101 coerces the size parameter with size |= 0, which converts it to a signed 32-bit integer. When size >= 2^31 (e.g., 2147483648), this wraps to -2147483648.

The negative value is passed to fillPool() (index.js:15):

functionfillPool(bytes){if(!pool||pool.length<bytes){// false: pool exists, -2B < pool.lengthpool=Buffer.allocUnsafe(bytes*POOL_SIZE_MULTIPLIER)crypto.getRandomValues(pool)poolOffset=0}elseif(poolOffset+bytes>pool.length){// false: poolOffset + (-2B) < pool.lengthcrypto.getRandomValues(pool)poolOffset=0}poolOffset+=bytes// poolOffset += -2147483648 → deeply negative}

Neither branch triggers, so the pool is never refreshed. poolOffset becomes ~-2.1 billion.

Subsequent nanoid() calls execute:

for(leti=poolOffset-size;i<poolOffset;i++){id+=scopedUrlAlphabet[pool[i]&63]}

pool[negative_index] returns undefined. undefined & 63 evaluates to 0. urlAlphabet[0] is 'u'. Every ID becomes "uuuuuuuuuuuuuuuuuuuuu".

The corruption is persistent — it affects all subsequent calls in the process until ~100 million calls eventually wrap poolOffset back to positive, or the process restarts.

PoC

import{nanoid}from'nanoid'// Step 1: Normal operationconsole.log(nanoid())// e.g., "V1StGXR8_Z5jdHi6B-myT"// Step 2: Trigger overflow (e.g., from an API parameter)try{nanoid(2147483648)}catch(e){}// Step 3: All subsequent IDs are deterministicconsole.log(nanoid())// "uuuuuuuuuuuuuuuuuuuuu"console.log(nanoid())// "uuuuuuuuuuuuuuuuuuuuu"console.log(nanoid())// "uuuuuuuuuuuuuuuuuuuuu"// ... forever, process-wide

Run with: node --experimental-vm-modules poc.mjs

Attack scenario: Any API endpoint that accepts a user-controlled length/size parameter (URL shortener slug length, configurable token size, etc.) and passes it to nanoid(userInput).

Impact

Complete loss of ID unpredictability and uniqueness, process-wide, from a single request.

• All session IDs, CSRF tokens, API keys, and database identifiers generated after the attack are identical and predictable
• An attacker can predict all tokens issued to other users, enabling session hijacking and authentication bypass
• The corruption is persistent (survives across requests) and affects all consumers of nanoid in the same process
• No special privileges or preconditions required — a single unauthenticated request is sufficient
• Affects any application that passes external input to the size parameter without validation

Severity

• CVSS Score: 7.4 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

• https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w
• https://nvd.nist.gov/vuln/detail/CVE-2026-73086
• https://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4
• https://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3
• https://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac
• https://github.com/ai/nanoid/releases/tag/3.3.12
• https://github.com/ai/nanoid/releases/tag/5.1.11
• https://github.com/advisories/GHSA-xwg4-73v4-xw9w

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

ai/nanoid (nanoid)

v3.3.12

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• Fixed breaking Nano ID by requesting big ID.

v3.3.11

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• Fixed React Native support.

v3.3.10

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• Fixed React Native support (by @​steida).

v3.3.9

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• Reduced npm package size.

v3.3.8

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• Fixed a way to break Nano ID by passing non-integer size (by @​myndzi).

v3.3.7

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• Fixed node16 TypeScript support (by Saadi Myftija).

v3.3.6

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• Fixed package.

v3.3.5

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• Backport funding information.

v3.3.4

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• Fixed --help in CLI (by @​Lete114).

v3.3.3

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• Reduced size (by Anton Khlynovskiy).

v3.3.2

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• Fixed enhanced-resolve support.

v3.3.1

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• Fixed breaking Nano ID by requesting big ID.

v3.3.0

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v3.2.0

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v3.1.32

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• Reduced async exports size (by Artyom Arutyunyan).
• Moved from Jest to uvu (by Vitaly Baev).

v3.1.31

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• Fixed collision vulnerability on object in size (by Artyom Arutyunyan).

v3.1.30

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• Reduced size for project with brotli compression (by Anton Khlynovskiy).

v3.1.29

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• Reduced npm package size.

v3.1.28

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• Reduced npm package size.

v3.1.27

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• Cleaned dependencies from development tools.

v3.1.26

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• Improved performance (by Eitan Har-Shoshanim).
• Reduced npm package size.

v3.1.25

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• Fixed browserify support.

v3.1.24

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• Fixed browserify support (by Artur Paikin).

v3.1.23

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• Fixed esbuild support.

v3.1.22

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• Added default and browser.default to package.exports.

v3.1.21

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• Reduced npm package size.

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