CVE-2026-6063

Authorization Bypass Through User-Controlled Key in GitLab

CVSS 4.3 MEDIUMEPSS 0.2%CWE-639

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 4.3EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

14 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

GitLab has remediated an issue in GitLab EE affecting all versions from 11.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user with developer-role permissions to remove code owner approval rules from merge requests due to improper access control.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

GitLab · GitLab

public PoCs found — 1

cve_referencehackerone.com/reports/3649087unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/596332 https://hackerone.com/reports/3649087