GHSA-2v37-7h3g-55p8
nanoid: custom generators can loop indefinitely when size is zero
At a glance
- Published
- Updated
- CVE
- CVE-2026-67213
- CVSS_V3
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS_V4
- 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 5.1.6 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.
Affected packages
| Package | Versions |
|---|---|
| npm · nanoid | introduced 0, fixed 3.3.18 |
| npm · nanoid | introduced 4.0.0, fixed 5.1.6 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-67213 ADVISORY
- https://github.com/ai/nanoid/commit/cb3626d0f3342fdf179cd425fd9c4fbb92c7d0e7 WEB
- https://github.com/ai/nanoid/commit/e10f8d40ce9d1ab47f66d65a16b48086432730d0 WEB
- https://github.com/ai/nanoid/commit/f9d13f150847d117877adee3460a46eceb0cf49b WEB
- https://github.com/ai/nanoid PACKAGE
- https://github.com/ai/nanoid/releases/tag/3.3.17 WEB
- https://github.com/ai/nanoid/releases/tag/3.3.18 WEB
- https://github.com/ai/nanoid/releases/tag/5.1.6 WEB
- https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-zero-size-in-customalphabet-and-customrandom WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |