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Description

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.

PUBLISHED Reserved 2026-03-25 | Published 2026-05-27 | Updated 2026-05-28 | Assigner GitLab




HIGH: 8.2CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Problem types

CWE-639: Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

18.8 (semver) before 18.10.7
affected

18.11 (semver) before 18.11.4
affected

19.0 (semver) before 19.0.1
affected

Credits

Thanks [ahacker1](https://hackerone.com/ahacker1) for reporting this vulnerability through our HackerOne bug bounty program finder

References

gitlab.com/gitlab-org/gitlab/-/work_items/594809

hackerone.com/reports/3619872 (HackerOne Bug Bounty Report #3619872) technical-description exploit permissions-required

about.gitlab.com/...27/patch-release-gitlab-19-0-1-released/

cve.org (CVE-2026-4868)

nvd.nist.gov (CVE-2026-4868)

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