Vulnerability · Published Sep 4, 2026 · Assigned by AMZN

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

High 8.7

In plain English

A high-severity security flaw in aws-efs-csi-driver from aws. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.1)8.7High

Exploit odds (30 days)0.4%top 61.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
aws	aws-efs-csi-driver	0 – through 3.4.0

Weakness: CWE-283 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

References

https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.4.1 patch, release-notes
https://aws.amazon.com/security/security-bulletins/2026-099-aws/ vendor-advisory