Home

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with custom role permissions to demote or remove higher-privileged group members due to improper authorization checks on member management operations.

PUBLISHED Reserved 2026-03-26 | Published 2026-04-08 | Updated 2026-04-09 | Assigner GitLab




LOW: 2.7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-862: Missing Authorization

Product status

Default status
unaffected

18.2 (semver) before 18.8.9
affected

18.9 (semver) before 18.9.5
affected

18.10 (semver) before 18.10.3
affected

Credits

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

References

hackerone.com/reports/3301240 (HackerOne Bug Bounty Report #3301240) technical-description exploit permissions-required

gitlab.com/gitlab-org/gitlab/-/work_items/565414

about.gitlab.com/...8/patch-release-gitlab-18-10-3-released/

cve.org (CVE-2026-4916)

nvd.nist.gov (CVE-2026-4916)

Download JSON