Improper Authentication Affecting virt-operator-fips-1.6 package, versions <1.6.6-r2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-VIRTOPERATORFIPS16-17690072
  • published30 Jun 2026
  • disclosed7 Nov 2025

Introduced: 7 Nov 2025

CVE-2025-64432  (opens in a new tab)
CWE-287  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Chainguard virt-operator-fips-1.6 to version 1.6.6-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt-operator-fips-1.6 package and not the virt-operator-fips-1.6 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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 Base Scores

version 3.1