Vulnerability · Published Apr 8, 2026 · Assigned by GitLab
CVE-2026-2104Authorization 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 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 74.9% 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 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to access confidential issues assigned to other users via CSV export due to insufficient authorization checks.
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
References
- HackerOne Bug Bounty Report #3541476 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/589021
- https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/