ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction
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.
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describes (2)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-42880US | — | Exploit | ||
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-… | ||||
| CVE-2026-43824US | —OT elevated | — | ||
In Argo CD 3.2.0 before 3.2.11 and 3.3.0 before 3.3.9, ServerSideDiff allows reading cleartext Kubernetes Secret data. | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHBA-2026:12433WEB
- https://access.redhat.com/errata/RHSA-2026:20943WEB
- https://access.redhat.com/errata/RHSA-2026:20947WEB
- https://access.redhat.com/security/cve/CVE-2026-42880WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2467882WEB
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3ADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-42880WEB
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.jsonWEB
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