{"schemaVersion":3,"id":"CVE-2026-77459","aliases":["GHSA-fmxq-cgp8-87wp","CGA-3f8r-937r-95rg","CGA-fchm-xv7j-c7mr","CGA-fh87-r2cg-92hg","CGA-hjhj-9v79-qm42","CGA-2rg4-33c7-ch37","CGA-3vxm-rwrj-wgfh","CGA-cf8f-pv67-9w9h","CGA-gmj8-gvrp-3mm8","CGA-mhp8-chr6-xwfj","CGA-pvjg-fc2m-q5px","CGA-r6wr-37wg-3frq","CGA-rwpr-v3m5-rqpg","CGA-v73g-3gcq-xmgh","CGA-wxh8-82jq-267j","CGA-8vvj-fw6c-hjfv","CGA-xrx3-ffmv-978r"],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-10-13T16:26:47.088Z","modified":"2026-10-14T15:29:55.346Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.9,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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