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

Published Mar 17, 2026
·
Updated

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.

Affected Software

2 affected componentsFixes available
Kubernetes CSI Driver for NFS
go/github.com/kubernetes-csi/csi-driver-nfs<0.0.0-20260210055231-316af2d86b91
0.0.0-20260210055231-316af2d86b91

Remediation

Information

Upgrade the CSI Driver for NFS to version 4.13.1 or later. As mitigations, restrict PersistentVolume creation privileges to trusted administrators and review NFS exports to ensure only intended directories are writable by the driver.

Event History

Mar 20, 2026
CVE Published
via MITRE·10:21 PM
Data Sourced
via MITRE·10:21 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·11:16 PM
DescriptionSeverityWeakness
Mar 21, 2026
Advisory Published
via GitHub·12:31 AM
Data Sourced
via GitHub·12:31 AM
DescriptionSeverityWeaknessAffected Software
Nov 2, 58232
Event
via FIRST·04:44 PM
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Frequently Asked Questions

1

What is the severity of CVE-2026-3864?

CVE-2026-3864 is classified as a high severity vulnerability due to its potential impact on data integrity and security.

2

How do I fix CVE-2026-3864?

To remediate CVE-2026-3864, ensure that the subDir parameter in volume identifiers is properly validated and consider applying the latest patches for the Kubernetes CSI Driver for NFS.

3

What are the potential consequences of CVE-2026-3864?

The consequences of CVE-2026-3864 may include unintended deletion of directories on the NFS server, leading to data loss.

4

Who is affected by CVE-2026-3864?

CVE-2026-3864 affects users of the Kubernetes CSI Driver for NFS who utilize the subDir parameter in their configurations.

5

When was CVE-2026-3864 discovered?

CVE-2026-3864 was discovered and publicly disclosed in March 2026.

Company

Resources

Contact

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