Vulnerability · Published May 14, 2026 · Assigned by GitLab
CVE-2026-1338Authorization Bypass Through User-Controlled Key in GitLab
Medium 4.3
In plain English
A medium-severity authorization bypass via user-controlled key in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 86.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user with developer-role permissions to delete protected container registry tags due to improper authorization checks.
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- HackerOne Bug Bounty Report #3480620 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/587326
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/