Is CVE-2026-3864 actively exploited?

No active exploitation of CVE-2026-3864 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3864 be exploited remotely?

Yes. CVE-2026-3864 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3864?

CVE-2026-3864 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-3864

CWE-22Published: March 20, 2026· Updated: Mar 23, 2026

6.5

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:15.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-3864 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.5.