CVE-2026-42880
9.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| argoproj | argo-cd | >= 3.2.0, < 3.2.11 | affected |
| argoproj | argo-cd | >= 3.3.0, < 3.3.9 | affected |
Weaknesses
- CWE-200: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
- CWE-212: CWE-212: Improper Removal of Sensitive Information Before Storage or Transfer
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: total
Additional References
argoproj/argo-cd: Argo CD: Information disclosure of Kubernetes Secret data via Server-Side Apply dry-run mechanism
Additional References
- 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
- https://access.redhat.com/errata/RHSA-2026:20943
- https://access.redhat.com/errata/RHSA-2026:20947
- https://access.redhat.com/errata/RHBA-2026:12433
References
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