Input validation error in Argo CD - CVE-2025-59537
Published: May 2, 2026
Vulnerability identifier: #VU129014
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-59537
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in the /api/webhook endpoint when processing Gogs push event payloads. A remote attacker can send a specially crafted webhook request to cause a denial of service.
With the default configuration, exploitation is possible when no webhook.gogs.secret is set, and the crafted JSON sets commits[].repo to null or omits it.
Affected software
Argo CD
How to mitigate CVE-2025-59537
Install security update from vendor's website.
Argo CD - addressed in versions 2.14.20, 3.0.19, 3.1.8