VulnerabilityAnalyzed

CVE-2026-41907

This allows silent partial writes into caller-provided buffers.

HIGH 8.1EPSS 0.35%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 4.0: 8.1 HIGHCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.35% probability · 28th percentile
CISA KEV: Not listed
Weakness: CWE-787, CWE-823
Affected: uuidjs/uuid
Source: security-advisories@github.com

References

https://github.com/uuidjs/uuid/security/advisories/GHSA-w5hq-g745-h8pqExploit, Mitigation, Vendor Advisory
https://github.com/uuidjs/uuid/security/advisories/GHSA-w5hq-g745-h8pqExploit, Mitigation, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.