Detections
Analytics
CVE-2026-42880
high
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.
References
https://thehackernews.com/2026/07/unpatched-argo-cd-repo-server-flaw.html
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json
https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3
https://bugzilla.redhat.com/show_bug.cgi?id=2467882
https://access.redhat.com/security/cve/CVE-2026-42880
https://access.redhat.com/errata/RHSA-2026:20947