CVE-2025-64432Public exploit

RBAC bypass via unchecked client certificate CN

Published Nov 7, 2025 · Updated Nov 7, 2025

Authentication bypass in KubeVirt before 1.5.3 and 1.6.0 allows local users to bypass RBAC controls via crafted mTLS requests. The virt-api SetupTLSWithCertManager path accepts certificates signed by the client CA without comparing their Common Name with the extension-apiserver-authentication allowlist. Exploitation requires a compromised pod and a stolen authentication-proxy certificate, enabling forged aggregator identity headers to reset or freeze virtual machines or remove their volumes.

CVSS severity4.7
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in KubeVirt before 1.5.3 and 1.6.0 allows local users to bypass RBAC controls via crafted mTLS requests. The virt-api SetupTLSWithCertManager path accepts certificates signed by the client CA without comparing their Common Name with the extension-apiserver-authentication allowlist. Exploitation requires a compromised pod and a stolen authentication-proxy certificate, enabling forged aggregator identity headers to reset or freeze virtual machines or remove their volumes.

The record

CVE
CVE-2025-64432
Published
Nov 7, 2025
Updated
Nov 7, 2025
Vendor
KubeVirt
Product
KubeVirt
Classifications
CWE-295, CWE-287, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.5.3
  2. Affected versionversion=>= 1.6.0, < 1.6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

KubeVirt · KubeVirtversion=< 1.5.3; version=>= 1.6.0, < 1.6.1

Published CVSS scores

4.7GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CWE-287Improper Authentication
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo