critical9.6
CVE-2026-42880
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/argoproj/argo-cd/v3 | >= 3.2.0, < 3.2.11 | 3.2.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Argoproj | Argo Cd | from 3.2.0 before 3.2.11 from 3.3.0 before 3.3.9 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3v3m-wc6v-x4x3
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3
- https://nvd.nist.gov/vuln/detail/CVE-2026-42880
- https://access.redhat.com/errata/RHBA-2026:12433
- https://access.redhat.com/errata/RHSA-2026:20943
- https://access.redhat.com/errata/RHSA-2026:20947
- https://access.redhat.com/security/cve/CVE-2026-42880
- https://bugzilla.redhat.com/show_bug.cgi?id=2467882
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json