CVE-2026-1101

MEDIUM 6.5

Improper Validation of Specified Quantity in Input in GitLab

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

5th

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.

CWE	CWE-1284
Vendor	gitlab
Product	gitlab
Ecosystems	DevTools
Industries	Technology
Published	Apr 8, 2026
Last Updated	Apr 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

GitLab / GitLab

18.2 < 18.8.9 18.9 < 18.9.5 18.10 < 18.10.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hackerone.com: https://hackerone.com/reports/3460228 gitlab.com: https://gitlab.com/gitlab-org/gitlab/-/work_items/586488 about.gitlab.com: https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/

Credits

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