CVE-2025-13690

medium

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.11 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to cause a denial of service condition due to improper input validation on webhook custom header names under certain conditions.

References

https://hackerone.com/reports/3415683

https://gitlab.com/gitlab-org/gitlab/-/work_items/582096

https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/

Details

Source: Mitre, NVD

Published: 2026-03-11

Updated: 2026-03-11

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 6.5

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

Severity: Medium