CVE-2025-59538
HIGH7.5EPSS 0.04%Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook
Published: 9/30/2025Modified: 3/20/2026
Description
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. For versions 2.9.0 through 2.14.19, 3.0.0 through 3.2.0, 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, 3.1.8 and 3.0.19.
Affected packages (6)
- Bitnami/argo-cd>= 2.9.0, < 2.14.20, >= 3.0.0, < 3.0.19, >= 3.1.0, < 3.1.8
- Go/github.com/argoproj/argo-cdfrom 0
- Go/github.com/argoproj/argo-cd/v2>= 2.9.0-rc1, < 2.14.20
- Go/github.com/argoproj/argo-cd/v2>= 2.9.0-rc1, < 2.14.20
- Go/github.com/argoproj/argo-cd/v3>= 3.2.0-rc1, < 3.2.0-rc2
- Go/github.com/argoproj/argo-cd/v3>= 3.0.0-rc1, < 3.0.19, >= 3.1.0-rc1, < 3.1.8, >= 3.2.0-rc1, < 3.2.0-rc2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |