4.7

CVE-2025-64432: KubeVirt Affected by an Authentication Bypass in Kubernetes Aggregation Layer

Analyzed
AliasesCGA-cp8p-r538-72xqCGA-q764-342f-j3pwGHSA-38jw-g2qx-4286
Published 07-11-2025Last modified 07-11-2025

Vulnerability summary

CVE-2025-64432 is a medium (CVSS 4.7) Improper Authentication vulnerability in kubevirt. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.8% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 6 · Related 7
OPENSUSE-SU-2026:20281-1OPENSUSE-SU-2026:21483-1SUSE-SU-2025:4330-1SUSE-SU-2026:20551-1SUSE-SU-2026:20571-1SUSE-SU-2026:20610-1

Timeline

  1. 07-11-2025
    PublishedVulnerability first disclosed.
  2. 07-11-2025
    Last modifiedVulnerability information updated.

Description

KubeVirt is a virtual machine management add-on for Kubernetes. Versions 1.5.3 and below, and 1.6.0 contained a flawed implementation of the Kubernetes aggregation layer's authentication flow which could enable bypass of RBAC controls. It was discovered that the virt-api component fails to correctly authenticate the client when receiving API requests over mTLS. In particular, it fails to validate the CN (Common Name) field in the received client TLS certificates against the set of allowed values defined in the extension-apiserver-authentication configmap. Failre to validate certain fields in the client TLS certificate may allow an attacker to bypass existing RBAC controls by directly communicating with the aggregated API server, impersonating the Kubernetes API server and its aggregator component. This issue is fixed in versions 1.5.3 and 1.6.1.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.14% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Kubevirt

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard16 products
  • docker-machine-driver-harvester< 1.0.6-r4
  • virt-api-1.6< 1.6.4-r0
  • virt-api-fips-1.6< 1.6.4-r0
  • virt-chroot-1.6< 1.6.4-r0
  • virt-chroot-fips-1.6< 1.6.4-r0
Kubevirt1 product
  • kubevirt≥ 1.6.0, < 1.6.1 | < 1.5.3 | 1.6.0 | 1.6.0:rc0 | 1.6.0:rc1
Kubevirt.io1 product
  • kubevirt< 1.5.3 | ≥ 1.6.0-alpha.0, < 1.6.1 | ≥ 1.7.0-alpha.0, < 1.7.0-rc.0 | ≥ 1.6.2, < 1.7.0-rc.0
Wolfi1 product
  • docker-machine-driver-harvester< 1.0.6-r4

4 vendors · 19 products

References

7 links