nanoid: custom generators can loop indefinitely when size is zero
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-67213US | high7.5 | — | ||
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 generat… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/ai/nanoidPACKAGE
- https://github.com/ai/nanoid/commit/cb3626d0f3342fdf179cd425fd9c4fbb92c7d0e7WEB
- https://github.com/ai/nanoid/commit/e10f8d40ce9d1ab47f66d65a16b48086432730d0WEB
- https://github.com/ai/nanoid/commit/f9d13f150847d117877adee3460a46eceb0cf49bWEB
- https://github.com/ai/nanoid/releases/tag/3.3.17WEB
- https://github.com/ai/nanoid/releases/tag/3.3.18WEB
- https://github.com/ai/nanoid/releases/tag/5.1.6WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-67213ADVISORY
scry
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