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CVE-2026-67213

CVE-2026-67213 · nanoid before 5.1.6 Infinite Loop via Zero Size in customAlphabet and customRandom

This page contains facts from public vulnerability sources. Check the original advisory before updating.

nanoid (Nano ID) before 5.1.6 contains an infinite loop in the customAlphabet and customRandom functions. When these functions are configured with a size of 0, the internal generation loop never satisfies its exit condition and spins indefinitely, hanging the calling thread. An application that passes an unvalidated, attacker-controlled size of 0 to these functions is exposed to a denial-of-service condition.

CVSS 8.2 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • nanoid

    Versions
    • ≥ 3.0.0, < 3.3.17: Affected (semver)
    • ≥ 5.0.0, < 5.1.6: Affected (semver)

    Update to 3.3.17; Update to 5.1.6

  • 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
    • 8.5.6+~cs9.3.28-1
    Affected ranges
    • ECOSYSTEM: < 8.5.8+~cs9.3.30-1

    Update to 8.5.8+~cs9.3.30-1

  • nanoid npm

    Affected ranges
    • SEMVER: < 3.3.18

    Update to 3.3.18

  • nanoid npm

    Affected ranges
    • SEMVER: ≥ 4.0.0, < 5.1.6

    Update to 5.1.6

  • 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

Original sources

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