CVE-2025-59538

Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook

State: Published
Severity: 7.5 High
Published: Oct 1, 2025
Updated: Oct 2, 2025
Reserved: Sep 17, 2025

Description

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. For versions 2.9.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.6 and 3.0.17, when the webhook.azuredevops.username and webhook.azuredevops.password are not set in the default configuration, the /api/webhook endpoint crashes the entire argocd-server process when it receives an Azure DevOps Push event whose JSON array resource.refUpdates is empty. The slice index [0] is accessed without a length check, causing an index-out-of-range panic. A single unauthenticated HTTP POST is enough to kill the process. This issue is resolved in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-248 Uncaught Exception
CWE-703 Improper Check or Handling of Exceptional Conditions

Affected Products

Product	Versions
argo-cdargoproj	>= 2.9.0-rc1, < 2.14.20Affected >= 3.2.0-rc1, < 3.2.0-rc2Affected >= 3.1.0-rc1, < 3.1.8Affected >= 3.0.0-rc1, < 3.0.19Affected

References

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