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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-77459 ↗
- github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c ↗
- github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511 ↗
- github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696 ↗
- github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4 ↗
- github.com/argoproj/argo-cd/releases/tag/v3.3.15 ↗
- github.com/argoproj/argo-cd/releases/tag/v3.4.10 ↗
- github.com/argoproj/argo-cd/releases/tag/v3.5.4 ↗
- github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2 ↗
- github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.