Vulnerability · Published Jun 11, 2026 · Assigned by GitLab
CVE-2026-6976Authorization Bypass Through User-Controlled Key in GitLab
Low 3.7
In plain English
A low-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 5% of all known vulnerabilities).
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.2%top 95.0% 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 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes from merge request diff views due to improper input handling of file names.
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/598165
- HackerOne Bug Bounty Report #3638136 technical-description, exploit, permissions-required
- https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/