Vulnerability · Published Mar 11, 2026 · Assigned by GitLab
CVE-2026-0602Authentication Bypass Using an Alternate Path or Channel in GitLab
Medium 4.3
In plain English
A medium-severity authentication bypass in GitLab from GitLab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 79.2% 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 15.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to disclose metadata from private issues, merge requests, epics, milestones, or commits due to improper filtering in the snippet rendering process under certain circumstances.
Affected products (as reported)
Weakness: CWE-288 · 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 #3486504 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/585007
- https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/