CVE-2025-64434Public exploit

Cross-node VM lifecycle control via shared TLS identity

Published Nov 7, 2025 · Updated Nov 7, 2025

Improper authentication in KubeVirt before 1.5.3 and 1.6.0-alpha.0 through 1.6.0 allows local users to control VMs on other nodes. The virt-handler verifyPeerCert logic accepts the same client certificate common name for virt-api and every virt-handler, so a node handler's TLS bundle authenticates as the API. Access to one virt-handler's client certificate and private key is required; reuse of those credentials reaches peer handlers and permits lifecycle actions such as VM reboot.

CVSS severity4.7
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in KubeVirt before 1.5.3 and 1.6.0-alpha.0 through 1.6.0 allows local users to control VMs on other nodes. The virt-handler verifyPeerCert logic accepts the same client certificate common name for virt-api and every virt-handler, so a node handler's TLS bundle authenticates as the API. Access to one virt-handler's client certificate and private key is required; reuse of those credentials reaches peer handlers and permits lifecycle actions such as VM reboot.

The record

CVE
CVE-2025-64434
Published
Nov 7, 2025
Updated
Nov 7, 2025
Vendor
KubeVirt
Product
KubeVirt
Classifications
CWE-287, T1649
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

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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-alpha.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-alpha.0, < 1.6.1

Published CVSS scores

4.7GitHubCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
6.3NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1649Steal or Forge Authentication Certificates

Public exploit references

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

Technologies

Your stack

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Your stack

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