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Description

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.

PUBLISHED Reserved 2026-04-10 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitLab




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-639: Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

11.10 (semver) before 18.9.7
affected

18.10 (semver) before 18.10.6
affected

18.11 (semver) before 18.11.3
affected

Credits

Thanks [pollito](https://hackerone.com/pollito) for reporting this vulnerability through our HackerOne bug bounty program finder

References

gitlab.com/gitlab-org/gitlab/-/work_items/596332

hackerone.com/reports/3649087 (HackerOne Bug Bounty Report #3649087) technical-description exploit permissions-required

about.gitlab.com/...3/patch-release-gitlab-18-11-3-released/

cve.org (CVE-2026-6063)

nvd.nist.gov (CVE-2026-6063)

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