Vulnerability in Argoproj Argo-Cd
CVE-2025-59538
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.
EPSS: 0.089 (94.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Argoproj Argo-cd — versions >= 2.9.0-rc1, < 2.14.20, >= 3.2.0-rc1, < 3.2.0-rc2, >= 3.1.0-rc1, < 3.1.8
- Argoproj Argo_cd — versions 3.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-59538?
- CVE-2025-59538 is a high-severity vulnerability in Argoproj Argo-Cd, classified under CWE-248. CVSS score: 7.5/10. Published 2025-10-01.
- How severe is CVE-2025-59538?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-59538 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.