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CVE-2026-4916

Missing Authorization in GitLab

CVSS 2.7 LOWEPSS 0.3%CWE-862
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Affected products
GitLab · GitLab
public PoCs found — 1
cve_referencehackerone.com/reports/3301240unverified
⚠ 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/2026/04/08/patch-release-gitlab-18-10-3-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/565414https://hackerone.com/reports/3301240