Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Argoproj | Argo Cd | >= 3.2.0, < 3.2.11 |
Related Weaknesses (CWE)
References
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3ExploitVendor Advisory
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3ExploitVendor Advisory
FAQ
What is CVE-2026-42880?
CVE-2026-42880 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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 ...
How severe is CVE-2026-42880?
CVE-2026-42880 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-42880?
Check the references section above for vendor advisories and patch information. Affected products include: Argoproj Argo Cd.