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Description

GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to cause denial of service to the GitLab instance due to improper input validation in GraphQL queries.

PUBLISHED Reserved 2026-01-16 | Published 2026-04-08 | Updated 2026-04-09 | Assigner GitLab




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

Problem types

CWE-1284: Improper Validation of Specified Quantity in Input

Product status

Default status
unaffected

18.2 (semver) before 18.8.9
affected

18.9 (semver) before 18.9.5
affected

18.10 (semver) before 18.10.3
affected

Credits

Thanks [sim4n6](https://hackerone.com/sim4n6) for reporting this vulnerability through our HackerOne bug bounty program finder

References

hackerone.com/reports/3460228 (HackerOne Bug Bounty Report #3460228) technical-description exploit permissions-required

gitlab.com/gitlab-org/gitlab/-/work_items/586488

about.gitlab.com/...8/patch-release-gitlab-18-10-3-released/

cve.org (CVE-2026-1101)

nvd.nist.gov (CVE-2026-1101)

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