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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.0 before 18.3.5, 18.4 before 18.4.3, and 18.5 before 18.5.1 that could have allowed an unauthenticated attacker to cause a denial of service condition by sending GraphQL requests with crafted JSON payloads.

PUBLISHED Reserved 2025-10-07 | Published 2025-10-27 | Updated 2025-10-28 | 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

11.0 (semver) before 18.3.5
affected

18.4 (semver) before 18.4.3
affected

18.5 (semver) before 18.5.1
affected

Credits

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

References

about.gitlab.com/...22/patch-release-gitlab-18-5-1-released/

gitlab.com/gitlab-org/gitlab/-/issues/574858 (GitLab Issue #574858) issue-tracking permissions-required

hackerone.com/reports/3367019 (HackerOne Bug Bounty Report #3367019) technical-description exploit permissions-required

cve.org (CVE-2025-11447)

nvd.nist.gov (CVE-2025-11447)

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