CVE-2026-85781

Unverified access point ownership in Amazon EFS CSI Driver

Assigner: AMZN
Reserved: 04.09.2026 Published: 04.09.2026 Updated: 04.09.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 5.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	Present	Availability	None	Availability	High
Privileges Required	High
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
CVSS Score: 8.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	aws
Product	aws-efs-csi-driver
Versions	Default: unaffected affected from 0 to 3.4.0 (incl.)

Vendor

aws

Product

aws-efs-csi-driver

Versions

Default: unaffected

affected from 0 to 3.4.0 (incl.)

References

Problem Types

CWE-283 Unverified ownership CWE

Impacts