CVE-2026-3864

Published: Mar 20, 2026Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 1.2 / Impact: 5.2

Source: jordan@liggitt.net (Secondary)

Description

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.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (3)

https://github.com/kubernetes/kubernetes/issues/137797

Source: jordan@liggitt.net

https://groups.google.com/g/kubernetes-security-announce/c/i4ZKN9VLcUE

Source: jordan@liggitt.net

http://www.openwall.com/lists/oss-security/2026/03/17/1

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.