CVE-2026-3864 json
CSI Driver for NFS path traversal via subDir may delete unintended directories on the NFS server
published 2026-03-20 7 mo ago modified 2026-06-17 4 mo ago also GHSA-2mjq-54qg-7w6j , GO-2026-4816 , EUVD-2026-13831
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/kubernetes-csi/csi-driver-nfs 0.0.0-20260210055231-316af2d86b91
- Kubernetes CSI Driver for NFS 4.13.1
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260326T203309-150000.1.155.2
suse advisories SUSE-SU-2026:1135-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/kubernetes-csi/csi-driver-nfs | <0.0.0-20260210055231-316af2d86b91 |
0.0.0-20260210055231-316af2d86b91 |
Affected products
- Kubernetes CSI Driver for NFS
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/kubernetes-csi/csi-driver-nfs/commit/316af2d86b913a595542dc17e8599cf81afd938f
web, patch
-
groups.google.com
/g/kubernetes-security-announce/c/i4ZKN9VLcUE
mailing-list, web
-
github.com
/kubernetes/kubernetes/issues/137797
issue-tracking, web
-
openwall.com
/lists/oss-security/2026/03/17/1
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-3864
advisory
-
github.com
/kubernetes-csi/csi-driver-nfs
package
-
github.com
/advisories/GHSA-2mjq-54qg-7w6j
advisory
Sources
- CVE List CVE-2026-3864
- GitHub Advisory GHSA-2mjq-54qg-7w6j
- NVD CVE-2026-3864
- OSV GO-2026-4816
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.