ai/nanoid · Security
nanoid: non-secure generators can loop indefinitely with negative size
- GHSA ID
- GHSA-28wg-ghj8-5hjv
- CVE ID
- CVE-2026-67214
- Severity
- high
- Published
- Updated
- CVSS
- 5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v4
- 8.2 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
nanoid (Nano ID) before 5.1.16 contains an infinite loop in the customAlphabet and nanoid functions of its non-secure module (nanoid/non-secure). When these functions are given a negative size, the loop counter is decremented from a negative value and never reaches its termination condition, spinning indefinitely and hanging the calling thread. An application that passes an unvalidated, attacker-controlled negative size to these functions is exposed to a denial-of-service condition.
CWEs
- CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-67214 ↗
- https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49 ↗
- https://github.com/ai/nanoid/releases/tag/5.1.16 ↗
- https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-negative-size-in-non-secure-module ↗
- https://github.com/ai/nanoid/pull/600 ↗
- https://github.com/ai/nanoid/pull/601 ↗
- https://github.com/ai/nanoid/commit/e835c9b71eab832bc6106944bdd26ea96cf2c66d ↗
- https://github.com/advisories/GHSA-28wg-ghj8-5hjv ↗