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CVE-2026-4868

Authorization Bypass Through User-Controlled Key in GitLab

CVSS 8.2 HIGHEPSS 0.3%CWE-639
GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under another user's identity due to improper user identity resolution when triggering Duo AI workflow runners.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
GitLab · GitLab
public PoCs found — 1
cve_referencehackerone.com/reports/3619872unverified
⚠ 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/2026/05/27/patch-release-gitlab-19-0-1-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/594809https://hackerone.com/reports/3619872