CVE-2026-85781 Unverified access point ownership in Amazon EFS CSI Driver
Authenticated Kubernetes users can delete unauthorized EFS directories by crafting malicious PersistentVolume objects, requiring an upgrade to the EFS CSI Driver.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85781?
CVE-2026-85781 is a medium-severity missing authorization vulnerability in aws-efs-csi-driver, published on 4 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Unverified ownership of a storage access point in the volume deletion component of the Amazon EFS CSI Driver before v3.4.1 might allow an authenticated Kubernetes user with PersistentVolume creation privileges to cause recursive deletion of directories on an EFS filesystem they are not authorized to access, via a crafted PersistentVolume volumeHandle that pairs an access point from one filesystem with a different target filesystem.
To remediate this issue, users should upgrade to version v3.4.1.
Weakness: CWE-283
Which versions are affected by CVE-2026-85781?
How do I fix CVE-2026-85781?
No fix has been published for CVE-2026-85781 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-85781 being exploited?
There is no known exploitation of CVE-2026-85781 in the wild and no public exploit code.