CVE-2026-85781CWE-283

CVE-2026-85781

High · published September 4, 2026

CVSS v3.1
8.7
EPSS
0%
Percentile
17.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
EPSS
0.00260 · 17.6th percentile
Weakness
CWE-283 · Unverified Ownership
Published
2026-09-04T23:17Z
References (2)
https://aws.amazon.com/security/security-bulletins/2026-099-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.4.1 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 18:49Z
    Unverified access point ownership in Amazon EFS CSI Driver
    cvelistv5