CVE-2026-3864 MEDIUM

CVE-2026-3864: CSI Driver for NFS path traversal via subDir may delete unintended directories on the NFS server

Vendor Kubernetes
Product CSI Driver for NFS
Weakness CWE-22 · Path traversal
Published March 20, 2026
Last update March 23, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

A vulnerability was discovered in the Kubernetes CSI Driver for NFS where the subDir parameter in volume identifiers was insufficiently validated. Attackers with the ability to create PersistentVolumes referencing the NFS CSI driver could craft volume identifiers containing path traversal sequences (../). During volume deletion or cleanup operations, the driver could operate on unintended directories outside the intended managed path within the NFS export. This may lead to deletion or modification of directories on the NFS server.

Key dates

02Disclosure timeline

March 20, 2026 CVE published
March 23, 2026 Record updated