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CVE-2026-4524

Authentication Bypass Using an Alternate Path or Channel in GitLab

CVSS 6.5 MEDIUMEPSS 0.3%CWE-288
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9.1 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user to access confidential issue content in public projects without proper authorization due to improper authorization checks.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected products
GitLab · GitLab
public PoCs found — 2
githubgithub.com/CyruxSec/CVE-2026-4524★ 0cve_referencehackerone.com/reports/3597717unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/594295https://hackerone.com/reports/3597717