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.
Affected products
argoproj: argo cd
References8
- github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-… ExploitVendor Advisory
- github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-… ExploitVendor Advisory
- 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?id=2467882
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880…
Metrics
- CVSS 3.1
-
9.6
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N - EPSS — exploit probability
- 1% percentile: 52 · as of 13 November 2026
- CWE
- CWE-200CWE-212CWE-201
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.