What is CVE-2026-54370?

CVE-2026-54370 is a medium-severity vulnerability in Acl Project, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.3/10. Published 2026-06-29.

How severe is CVE-2026-54370?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Acl Project

CVE-2026-54370

acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and s…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Acl Project — versions 0

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-54370?: CVE-2026-54370 is a medium-severity vulnerability in Acl Project, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.3/10. Published 2026-06-29.
How severe is CVE-2026-54370?: Medium severity. CVSS v3 base score is 6.3 out of 10.