CVE Tools
Sign in

CVE-2026-3864

CSI Driver for NFS path traversal via subDir may delete unintended directories on the NFS server

Published: Mar 20, 2026Updated: Mar 23, 2026 Sources: CVE List NVDCWE-22
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.5%
Top 59.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:NI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-22

Affected Products

CSI Driver for NFSKubernetes
Mixed
Cloud & SaaS / container-orchestration
kubernetesoss-projectUSCloud & SaaSaka k8s

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://groups.google.com/g/kubernetes-security-announce/c/i4ZKN9VLcUE
groups.google.com
https://github.com/kubernetes/kubernetes/issues/137797
github.com
http://www.openwall.com/lists/oss-security/2026/03/17/1
openwall.com

Timeline

Published
Mar 20, 2026
Last Updated
Mar 23, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-3864 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows