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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that under certain conditions could have allowed a blocked Project Access Token to continue accessing private resources due to incorrect authorization enforcement.

PUBLISHED Reserved 2026-05-28 | Published 2026-05-28 | Updated 2026-05-28 | Assigner GitLab




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

Problem types

CWE-863: Incorrect Authorization

Product status

Default status
unaffected

18.9 (semver) before 18.10.7
affected

18.11 (semver) before 18.11.4
affected

19.0 (semver) before 19.0.1
affected

Credits

Thanks [s4dmach1ne](https://hackerone.com/s4dmach1ne) for reporting this vulnerability through our HackerOne bug bounty program finder

References

hackerone.com/reports/3554993 (HackerOne Bug Bounty Report #3554993) technical-description exploit permissions-required

gitlab.com/gitlab-org/gitlab/-/work_items/590694

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

cve.org (CVE-2026-9807)

nvd.nist.gov (CVE-2026-9807)

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