CVE-2026-85781

High

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.

SeverityHigh

CVSS8.7

Exploit probability—

ProductAws-efs-csi-driver

PublishedSep 4, 2026

First seenSep 4, 2026

Weakness typeCWE-283CWE-283

How to fix

Patches

github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.4.1

Vendor advisories

aws.amazon.com/security/security-bulletins/2026-099-aws/

Affected products

Product	Affected versions	Fixed in
aws aws-efs-csi-driver	v ≤ 3.4.0	—

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