Improper access control in GitLab Enterprise Edition - CVE-2026-103515
Published: October 22, 2026
Vulnerability identifier: #VU157249
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-103515
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to override an administrator's Duo availability lock and re-enable AI-backed data egress to a third-party service for a group and its descendant projects.
The vulnerability exists due to improper access control in group Duo admin-lock enforcement for Amazon Q settings when an instance administrator has locked the group's Duo availability. A remote privileged user can change the affected settings with group Owner permissions to re-enable AI-backed data egress for the group and its descendant projects because the enforcement controls lack sufficient granularity.
Affected software
GitLab Enterprise Edition
How to mitigate CVE-2026-103515
Install security update from vendor's website.
GitLab Enterprise Edition - addressed in versions 19.3.6, 19.4.3, 19.5.1