CVE-2026-42880
Critical
Description
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9.
SeverityCritical
CVSS9.6
Exploit probability—
Product
Argoproj Argo Cd
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-200Sensitive information exposureCWE-212CWE-212
How to fix
Update
- argoproj argo_cd3.2.11, 3.3.9 or later
- github.com/argoproj/argo-cd/v33.2.11, 3.3.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| argoproj argo_cd | 3.2.0 ≤ v < 3.2.11, 3.3.0 ≤ v < 3.3.9 | 3.2.11, 3.3.9 |
| github.com/argoproj/argo-cd/v3Go | 3.2.0 ≤ v < 3.2.11, 3.3.0 ≤ v < 3.3.9 | 3.2.11, 3.3.9 |
| github.com/argoproj/argo-cdGo | No range specified | — |
| github.com/argoproj/argo-cd/v2Go | No range specified | — |
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