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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 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 cause denial of service by sending specially crafted JSON payloads due to insufficient input validation.

PUBLISHED Reserved 2025-12-18 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitLab




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

18.5 (semver) before 18.9.7
affected

18.10 (semver) before 18.10.6
affected

18.11 (semver) before 18.11.3
affected

Credits

Thanks [a92847865](https://hackerone.com/a92847865) for reporting this vulnerability through our HackerOne bug bounty program finder

References

hackerone.com/reports/3446641 (HackerOne Bug Bounty Report #3446641) technical-description exploit permissions-required

gitlab.com/gitlab-org/gitlab/-/work_items/584490

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

cve.org (CVE-2025-14870)

nvd.nist.gov (CVE-2025-14870)

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