8.1

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2026-1531

CVE-2026-1531: Foreman-kubevirt: foreman_kubevirt: man-in-the-middle due to insecure default ssl verification

A flaw was found in foreman_kubevirt. When configuring the connection to OpenShift, the system disables SSL verification if a Certificate Authority (CA) certificate is not explicitly set. This insecure default allows a remote attacker, capable of intercepting network traffic between Satellite and OpenShift, to perform a Man-in-the-Middle (MITM) attack. Such an attack could lead to the disclosure or alteration of sensitive information.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2026-1531

CVE-2026-1531:

8.1

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
foreman_kubevirt	rubygems	< 0.4.3	0.4.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability is caused by the insecure default of disabling SSL verification when connecting to OpenShift if a CA certificate is not explicitly provided. The patch addresses this by changing the default behavior to always verify SSL. The key change is in the client method within the app/models/foreman_kubevirt/kubevirt.rb file. Previously, the :kubevirt_verify_ssl option was set based on the presence of a CA certificate (ca_cert.present?). This meant if no CA was given, SSL verification was turned off. The fix changes this to true, ensuring that SSL verification is always enabled, thus preventing potential Man-in-the-Middle attacks. The update to the fog-kubevirt dependency ensures that this security setting is correctly enforced.

Vulnerable functions

ForemanKubevirt::Kubevirt.client

app/models/foreman_kubevirt/kubevirt.rb

The `client` function in the `ForemanKubevirt::Kubevirt` model was responsible for creating a connection to KubeVirt. The vulnerability lies in the `:kubevirt_verify_ssl` parameter being set to `ca_cert.present?`. This means that if no Certificate Authority (CA) certificate was provided (`ca_cert` was blank), SSL verification would be disabled, making the connection vulnerable to Man-in-the-Middle (MITM) attacks. The patch changes this to `:kubevirt_verify_ssl => true`, enforcing SSL verification by default.

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WAF Rule

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Reasoning

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