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Vulnerability record · CVE-2026-71566 · published 17 August 2026

CVE-2026-71566: Missing authentication for critical function vulnerability

FakeFish handles incoming credentials by passing them down to scripts. This works for real hardware because in the end it's up to the BMC to validate them. However, KubeVirt relies on a KUBECONFIG file mounted to the container and completely ignores the credentials. This allows any user of the cluster to control VMs of the user that created fakefish, power them on and off, and mount arbitrary CD images to them.

9.3 CVSS 3.1 Critical EPSS 0.37% · top 71.6% CWE-306 · Missing authentication for critical function Awaiting Analysis
9.3CVSS 3.1 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
1 Sep 2026Last modified by NVD

Description

FakeFish handles incoming credentials by passing them down to scripts. This works for real hardware because in the end it's up to the BMC to validate them. However, KubeVirt relies on a KUBECONFIG file mounted to the container and completely ignores the credentials. This allows any user of the cluster to control VMs of the user that created fakefish, power them on and off, and mount arbitrary CD images to them.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H

References

LinkTags
https://github.com/openshift-metal3/fakefish/security/advisories/GHSA-qpfr-jqjq-v83w

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Source: NIST National Vulnerability Database (record CVE-2026-71566), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.