CVE-2025-59538: Argoproj Argo Cd

High severity, CVSS 7.5. EPSS: 8.9% chance of exploitation in the next 30 days.

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.

Affected products

• Argoproj Argo Cd: from 2.9.0, before 2.14.20 (fixed in 2.14.20); from 3.0.0, before 3.0.19 (fixed in 3.0.19); from 3.1.0, before 3.1.8 (fixed in 3.1.8); version 3.2.0 only

Published 2025-10-01. Last modified 2026-06-17.