{"id":"CVE-2026-42880","aliases":["BIT-argo-cd-2026-42880","CVE-2026-43824","GHSA-3v3m-wc6v-x4x3","GO-2026-5099"],"url":"https://o3.security/vulnerability/CVE-2026-42880","summary":"ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction","details":"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.","published":"2026-05-07T22:20:39.506Z","modified":"2026-08-07T11:51:09.712941310Z","cvss":{"score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/argoproj/argo-cd/v3","fixedVersion":"3.2.11"},{"ecosystem":"Go","name":"github.com/argoproj/argo-cd/v3","fixedVersion":"3.3.9"}],"fix":null,"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHBA-2026:12433"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20943"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20947"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-42880"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42880.json"},{"type":"ADVISORY","url":"https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42880"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467882"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:09.712941310Z"}}