Vulnerability · Published May 28, 2026 · Assigned by GitLab
CVE-2026-9807Incorrect Authorization in GitLab
Medium 4.3
In plain English
A medium-severity incorrect authorization in GitLab from GitLab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 91.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that under certain conditions could have allowed a blocked Project Access Token to continue accessing private resources due to incorrect authorization enforcement.
Affected products (as reported)
Weakness: CWE-863 · 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 #3554993 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/590694
- https://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/