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
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-42880 ↗
- github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3 ↗
- access.redhat.com/errata/RHBA-2026:12433 ↗
- access.redhat.com/errata/RHSA-2026:20943 ↗
- access.redhat.com/errata/RHSA-2026:20947 ↗
- access.redhat.com/security/cve/CVE-2026-42880 ↗
- bugzilla.redhat.com/show_bug.cgi ↗
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.