CVE-2026-73086
CVE-2026-73086 · nanoid: Integer Overflow or Wraparound
This page contains facts from public vulnerability sources. Check the original advisory before updating.
nanoid is a secure, URL-friendly, unique string ID generator for JavaScript. Prior to versions 3.3.12 and 5.1.11, the nanoid(size) function in index.js and index.cjs coerces the user-influenced size parameter to a signed 32-bit integer, allowing a value of 2147483648 to become -2147483648 and corrupt the process-wide CSPRNG poolOffset in fillPool(), which causes subsequent session tokens, CSRF tokens, API keys, and unique identifiers to become the deterministic string "uuuuuuuuuuuuuuuuuuuuu" until the process restarts. This issue is fixed in versions 3.3.12 and 5.1.11.
CVSS 7.4 · High · EPSS 0.3% · Fix available
- Published
- Updated
Affected products and versions
nanoid
- Versions
- < 3.3.12: Affected
- >= 4.0.0, < 5.1.11: Affected
No fix published
node-mocha Debian:12
- Affected ranges
- ECOSYSTEM: < 9.1.4+ds1+~cs28.2.8-1
Update to 9.1.4+ds1+~cs28.2.8-1
node-mocha Debian:13
- Affected ranges
- ECOSYSTEM: < 9.1.4+ds1+~cs28.2.8-1
Update to 9.1.4+ds1+~cs28.2.8-1
node-mocha Debian:14
- Affected ranges
- ECOSYSTEM: < 9.1.4+ds1+~cs28.2.8-1
Update to 9.1.4+ds1+~cs28.2.8-1
node-postcss Debian:12
- Versions
- 8.4.20+~cs8.0.23-1
- 8.4.20+~cs8.0.23-1+deb12u1
- 8.4.31+~cs8.0.26-1
- 8.4.39+~cs9.2.29-1
- 8.4.49+~cs9.2.32-1
- 8.5.12+~cs9.3.32-1
- 8.5.14+~cs9.3.34-1
- 8.5.15+~cs9.3.34-1
- 8.5.15+~cs9.3.38-1
- 8.5.15+~cs9.3.39-1
- 8.5.19+~cs10.2.23-1
- 8.5.21+~cs10.2.23-1
- 8.5.23+~cs10.2.23-1
- 8.5.25+~cs10.2.23-1
- 8.5.26+~cs10.2.24-1
- 8.5.28+~cs10.2.24-1
- 8.5.31+~cs10.2.26-1
- 8.5.6+~cs9.3.28-1
- 8.5.8+~cs9.3.30-1
- 8.5.9+~cs9.3.30-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-postcss Debian:13
- Versions
- 8.4.49+~cs9.2.32-1
- 8.5.12+~cs9.3.32-1
- 8.5.14+~cs9.3.34-1
- 8.5.15+~cs9.3.34-1
- 8.5.15+~cs9.3.38-1
- 8.5.15+~cs9.3.39-1
- 8.5.19+~cs10.2.23-1
- 8.5.21+~cs10.2.23-1
- 8.5.23+~cs10.2.23-1
- 8.5.25+~cs10.2.23-1
- 8.5.26+~cs10.2.24-1
- 8.5.28+~cs10.2.24-1
- 8.5.31+~cs10.2.26-1
- 8.5.6+~cs9.3.28-1
- 8.5.8+~cs9.3.30-1
- 8.5.9+~cs9.3.30-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-postcss Debian:14
- Versions
- 8.4.49+~cs9.2.32-1
- 8.5.12+~cs9.3.32-1
- 8.5.6+~cs9.3.28-1
- 8.5.8+~cs9.3.30-1
- 8.5.9+~cs9.3.30-1
- Affected ranges
- ECOSYSTEM: < 8.5.14+~cs9.3.34-1
Update to 8.5.14+~cs9.3.34-1
nanoid npm
- Affected ranges
- SEMVER: < 3.3.12
Update to 3.3.12
nanoid npm
- Affected ranges
- SEMVER: ≥ 4.0.0, < 5.1.11
Update to 5.1.11
node-mocha Ubuntu:16.04:LTS
- Versions
- 1.20.1-1
- 1.20.1-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-mocha Ubuntu:18.04:LTS
- Versions
- 1.20.1-7
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-mocha Ubuntu:20.04:LTS
- Versions
- 4.1.0+ds3-5
- 7.0.1+ds1-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-postcss Ubuntu:20.04:LTS
- Versions
- 6.0.23-1
- 6.0.23-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-postcss Ubuntu:22.04:LTS
- Versions
- 8.2.1+~cs5.3.23-8
- 8.4.5+~cs7.1.51-2
- 8.4.6+~cs7.3.21-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-postcss Ubuntu:24.04:LTS
- Versions
- 8.4.20+~cs8.0.23-1
- 8.4.31+~cs8.0.26-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-postcss Ubuntu:26.04:LTS
- Versions
- 8.5.6+~cs9.3.28-1
- 8.5.8+~cs9.3.30-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w
- 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://nvd.nist.gov/vuln/detail/CVE-2026-73086