Vulnerability Report

CVE-2025-13690

Title: DoS via improper input validation on webhook custom header names

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2025-13690.

CWE Category CWE-770

Published Date Mar 11, 2026

Modified Date Mar 13, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.09%

Vulnerability Summary

CVE-2025-13690: 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.

Impacted Vendors

jenkins 1

gitlab 1

Reference Links

https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/ https://gitlab.com/gitlab-org/gitlab/-/work_items/582096 https://hackerone.com/reports/3415683

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-13690 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

March 13, 2026 MODIFIED

Vulnerability data updated via NVD.

March 13, 2026 MODIFIED

Vulnerability data updated via NVD.

March 12, 2026 MODIFIED

Vulnerability data updated via NVD.

March 11, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.