ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.6epss 0.5%
from disclosure to weapon18 days
Published on NVDMay 7
1st PoC+18d
exploitation probability
0.5%top 59% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
argoproj · argo-cdpublic PoCs found — 1
githubgithub.com/HAERIN-L/POC_CVE-2026-42880★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://access.redhat.com/errata/RHBA-2026:12433https://access.redhat.com/errata/RHSA-2026:20943https://access.redhat.com/errata/RHSA-2026:20947https://access.redhat.com/security/cve/CVE-2026-42880https://bugzilla.redhat.com/show_bug.cgi?id=2467882https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json