CVE-2025-59537: argo cd Input Validation Flaw — Exploit

Description

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions 1.2.0 through 1.8.7, 2.0.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.7 and 3.0.18 are vulnerable to malicious API requests which can crash the API server and cause denial of service to legitimate clients. With the default configuration, no webhook.gogs.secret set, Argo CD’s /api/webhook endpoint will crash the entire argocd-server process when it receives a Gogs push event whose JSON field commits[].repo is not set or is null. This issue is fixed in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-20 Improper Input Validation

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
argoproj	argo_cd	1.2.0 — 1.8.7
argoproj	argo_cd	2.0.0 — 2.14.20
argoproj	argo_cd	3.0.0 — 3.0.19
argoproj	argo_cd	3.1.0 — 3.1.8
argoproj	argo_cd	All

References

Advisories & Patches

https://github.com/argoproj/argo-cd/commit/761fc27068d2d4cd24e1f784eb2a9033b5ee7f43 https://github.com/argoproj/argo-cd/security/advisories/GHSA-wp4p-9pxh-cgx2 https://github.com/argoproj/argo-cd/security/advisories/GHSA-wp4p-9pxh-cgx2

Exploits

https://github.com/argoproj/argo-cd/security/advisories/GHSA-wp4p-9pxh-cgx2 https://github.com/argoproj/argo-cd/security/advisories/GHSA-wp4p-9pxh-cgx2

Frequently Asked Questions

What is CVE-2025-59537? +

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions 1.2.0 through 1.8.7, 2.0.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.7 and 3.0.18 are vulnerable to malicious API requests which can crash the API server and cause denial of service to legitimate clients. With the default configuration, no webhook.gogs.secret set, Argo CD’s /api/webhook endpoint will crash the entire argocd-server process when it receives a Gogs push event whose JSON field commits[].repo is not set or is null. This issue is fixed in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-59537? +

CVE-2025-59537 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-59537? +

CVE-2025-59537 affects products from argoproj, specifically: argo_cd. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59537? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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