PT-2026-65811 · Nanoid · Nanoid

CVE-2026-67213 · Published 2026-07-29 · Updated 2026-07-29

Mitre

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2026-67213

Affected Products

Nanoid

References · 4

• https://github.com/ai/nanoid/commit/cb3626d0f3342fdf179cd425fd9c4fbb92c7d0e7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-67213 · Security Note
• https://github.com/ai/nanoid/releases/tag/5.1.6 · Note
• https://vulncheck.com/advisories/nanoid-before-infinite-loop-via-zero-size-in-customalphabet-and-customrandom · Note