CVE-2026-3864

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published3/20/2026

Last Modified3/23/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-22

References

https://github.com/kubernetes/kubernetes/issues/137797(jordan@liggitt.net)

https://groups.google.com/g/kubernetes-security-announce/c/i4ZKN9VLcUE(jordan@liggitt.net)

http://www.openwall.com/lists/oss-security/2026/03/17/1(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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