CVE-2025-59538
Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook
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.
How to fix CVE-2025-59538
To remediate CVE-2025-59538, upgrade the affected package to a fixed version below.
- —upgrade to 2.14.20 or later
- —no fix listed
- —upgrade to 2.14.20 or later
- —upgrade to 2.14.20 or later
- —upgrade to 3.2.0-rc2 or later
- —upgrade to 3.0.19 or later
Is CVE-2025-59538 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- >= 2.9.0, < 2.14.20, >= 3.0.0, < 3.0.19, >= 3.1.0, < 3.1.8
- from 0
- >= 2.9.0-rc1, < 2.14.20
- >= 2.9.0-rc1, < 2.14.20
- >= 3.2.0-rc1, < 3.2.0-rc2
- >= 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 |