CVE-2026-85781 - Unverified access point ownership in Amazon EFS CSI Driver

Bulletin ID: 2026-099-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 11:45 AM PDT Description: The Amazon EFS CSI Driver is an open-source Kubernetes Container Storage Interface (CSI) driver that lets Kubernetes workloads use Amazon EFS file systems. We identified CVE-2026-85781, an issue in the driver's volume-deletion logic. When the controller is configured with the non-default --delete-access-point-root-dir=true option, it did not verify that the EFS access point referenced by a PersistentVolume's volume handle belonged to the file system refere...