Skip to content
Fencer Vulns
high 8.8

CVE-2023-3893 json

Kubernetes - csi-proxy - Insufficient input sanitization leads to privilege escalation

published 2023-11-03 3 y ago modified 2026-06-17 4 mo ago also GHSA-r6cc-7wj7-gfx2 , GO-2023-2176 , EUVD-2023-3024

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

A security issue was discovered in Kubernetes where a user that can create pods on Windows nodes running kubernetes-csi-proxy may be able to escalate to admin privileges on those nodes. Kubernetes clusters are only affected if they include Windows nodes running kubernetes-csi-proxy.

Patch / fix

  • go github.com/kubernetes-csi/csi-proxy/v2 2.0.0-alpha.1
  • go github.com/kubernetes-csi/csi-proxy 0.0.0-20230821192013-2523e6674ded, 1.1.3, 1.1.3-0.20230821192013-2523e6674ded
  • Kubernetes csi-proxy v1.1.3, v2.0.0-alpha.1
  • kubernetes Debian 14, Debian 13, Debian 12 1.20.5+really1.20.2-1

debian advisories DEBIAN-CVE-2023-3893

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-3893 updated cvss 8.8

kubernetes: Insufficient input sanitization on kubernetes CSI proxy leads to privilege escalation

  • Red Hat OpenShift Container Platform 4 openshift4-wincw/windows-machine-config-rhel8-operator
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.48% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/kubernetes-csi/csi-proxy/v2
>=2.0.0-alpha.0, <2.0.0-alpha.1
2.0.0-alpha.1
go github.com/kubernetes-csi/csi-proxy
>=0.1.0-rc1, <1.1.3
<0.0.0-20230821192013-2523e6674ded
>=1.1.3-0, <1.1.3-0.20230821192013-2523e6674ded
<1.1.3
1.1.3
0.0.0-20230821192013-2523e6674ded
1.1.3-0.20230821192013-2523e6674ded

Affected products

  • Kubernetes csi-proxy

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

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.