CVE-2025-13690

MEDIUM

GitLab 16.11-18.7.5, 18.8-18.8.5, 18.9-18.9.1 - Authenticated Denial of Service via Webhook Custom Header Input

Title source: llm
STIX 2.1

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 (3)

Core 3
Core References
Third Party Advisory technical-description exploit permissions-required
https://hackerone.com/reports/3415683

Scores

CVSS v3 6.5
EPSS 0.0039
EPSS Percentile 30.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (1)
gitlab/gitlab 16.11.0 - 18.7.6 (2 CPE variants)
Published Mar 11, 2026
Tracked Since Mar 11, 2026