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9.9 Critical

CVE-2026-77459 Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes

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.

Affected products and versions

Product Affected versions Fixed in
argo-cd 3.6 3.6.0-rc1 → < 3.6.0-rc2 3.6.0-rc2
argo-cd 3.5 3.5.0 → < 3.5.4 3.5.4
argo-cd 3.4 3.4.0 → < 3.4.10 3.4.10
argo-cd 3.0 3.0.0 → < 3.3.15 3.3.15
argo-cd 2.10 2.10.0 → 2.14.21 No fix stated

References

Timeline

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