Vulnerability · Published Oct 1, 2025 · Assigned by GitHub_M
CVE-2025-59538Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook
High 7.5
In plain English
A high-severity security flaw in argo-cd from argoproj. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 9.4% (higher than 95% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/argoproj/argo-cd | no fix listed | GO-2025-3995 |
| Go | github.com/argoproj/argo-cd/v2 | 2.14.20 | GO-2025-3995 |
| Go | github.com/argoproj/argo-cd/v2 | 2.14.20 | GHSA-gpx4-37g2-c8pv |
| Go | github.com/argoproj/argo-cd/v3 | 3.0.19, 3.1.8, 3.2.0-rc2 | GO-2025-3995 |
| Go | github.com/argoproj/argo-cd/v3 | 3.0.19 | GHSA-gpx4-37g2-c8pv |
| Go | github.com/argoproj/argo-cd/v3 | 3.2.0-rc2 | GHSA-gpx4-37g2-c8pv |
| Go | github.com/argoproj/argo-cd/v3 | 3.1.8 | GHSA-gpx4-37g2-c8pv |
Affected products (as reported)
Weakness: CWE-248, CWE-703 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H