CVE-2026-41907 PUBLISHED

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

Assigner: GitHub_M
Reserved: 22.04.2026 Published: 24.04.2026 Updated: 24.04.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	uuidjs
Product	uuid
Versions	Version < 14.0.0 is affected

References

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

Problem Types

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