{"id":"CVE-2026-77459","revision":"6ce9e86c1d9c4a6a80c76c9608a82885","records":[{"revision":"6ce9e86c1d9c4a6a80c76c9608a82885","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-77459","aliases":[],"title":"Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks","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.","state":0,"publishedAt":"2026-10-13T16:26:47.088+00:00","modifiedAt":"2026-10-14T15:29:55.346+00:00","affected":[{"ecosystem":"Vendor product","name":"argo-cd","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"argoproj\",\n                    \"product\": \"argo-cd\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.10.0, <= 2.14.21\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.0.0, < 3.3.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.4.0, < 3.4.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.5.0, < 3.5.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.6.0-rc1, < 3.6.0-rc2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9,"severity":"CRITICAL"}],"references":["https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp","https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c","https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511","https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696","https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4","https://github.com/argoproj/argo-cd/releases/tag/v3.3.15","https://github.com/argoproj/argo-cd/releases/tag/v3.4.10","https://github.com/argoproj/argo-cd/releases/tag/v3.5.4","https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77459","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77459","identifiers":["CVE-2026-77459"]},"retained":false,"historicalAffected":[]}],"coverage":[]}