{"id":"CVE-2026-77459","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77459","generatedAt":"2026-10-27T23:57:30.103Z","title":"The omitted checks include cluster-scoped and namespaced resource allow/deny lists.","description":"Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From 2.10.0 until 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2, Argo CD creates PostDelete resource hooks without applying the AppProject destination and resource authorization checks used during ordinary synchronization. The omitted checks include cluster-scoped and namespaced resource allow/deny lists. A user who can write to an Application's Git repository can commit a delete hook targeting a forbidden namespace, server, group, kind, or resource name, and deletion of the Application causes the application-controller to create that resource with its destination-cluster credentials. The reachable impact is bounded by the controller's cluster access but can include cluster-scoped resources, disallowed namespaces, persistent hook objects, and secondary objects created by a hook Job. PreSync, Sync, PostSync, and SyncFail hooks continue to use the normal project checks. This issue is fixed in versions 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2.","published":"2026-10-13T17:17:46.000Z","lastModified":"2026-10-16T16:00:34.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-863"],"affected":[],"epss":{"score":0.00498,"percentile":0.42381,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.0072,"percentile":0.52865}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T17:17:46.000Z","detail":{"score":"9.9","severity":"CRITICAL","publishedAt":"2026-10-13T17:17:46.050Z"},"summary":"New CVE, critical severity (CVSS 9.9)."}],"references":[{"url":"https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/releases/tag/v3.3.15","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/releases/tag/v3.4.10","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/releases/tag/v3.5.4","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2","source":"security-advisories@github.com"},{"url":"https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77459","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}