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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to create unauthorized Jira subscriptions for a targeted user's namespace via a specially crafted link due to missing CSRF protection.

PUBLISHED Reserved 2026-03-20 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitLab




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Problem types

CWE-352: Cross-Site Request Forgery (CSRF)

Product status

Default status
unaffected

11.10 (semver) before 18.9.7
affected

18.10 (semver) before 18.10.6
affected

18.11 (semver) before 18.11.3
affected

Credits

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

References

gitlab.com/gitlab-org/gitlab/-/work_items/594339

hackerone.com/reports/3590487 (HackerOne Bug Bounty Report #3590487) technical-description exploit permissions-required

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

cve.org (CVE-2026-4527)

nvd.nist.gov (CVE-2026-4527)

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