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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user with a read_api scoped OAuth application to create issues and add comments to issues in private projects due to improper authorization.

PUBLISHED Reserved 2026-01-22 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitLab




MEDIUM: 6.8CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-840: Business Logic Errors

Product status

Default status
unaffected

16.0 (semver) before 18.9.7
affected

18.10 (semver) before 18.10.6
affected

18.11 (semver) before 18.11.3
affected

Credits

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

References

hackerone.com/reports/3508895 (HackerOne Bug Bounty Report #3508895) technical-description exploit permissions-required

gitlab.com/gitlab-org/gitlab/-/work_items/587270

about.gitlab.com/...3/patch-release-gitlab-18-11-3-released/

cve.org (CVE-2026-1322)

nvd.nist.gov (CVE-2026-1322)

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