CVE-2026-41907

uuid: Missing buffer bounds check in `v3`/`v5`/`v6` when `buf` is provided

State: Published
Severity: 8.1 High
Published: Apr 24, 2026
Updated: Apr 27, 2026
Reserved: Apr 22, 2026

Description

uuid is for the creation of RFC9562 (formerly RFC4122) UUIDs. Prior to 14.0.0, v3, v5, and v6 accept external output buffers but do not reject out-of-range writes (small buf or large offset). This allows silent partial writes into caller-provided buffers. This vulnerability is fixed in 14.0.0.

Scores

CVSS	Score	Vector	Source
4.0	8.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U	GitHub_M

Weaknesses

CWE-823 Use of Out-of-range Pointer Offset
CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
uuiduuidjs	< 14.0.0Affected

References

https://github.com/uuidjs/uuid/security/advisories/GHSA-w5hq-g745-h8pq

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