What’s Vulnerable › Vulnerabilities

CVE-2026-105223: maclof kubernetes-client 0.17.0 before 0.32.0 Disabled TLS Certificate Verification

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-05 · updated 2026-10-27
• Weakness: CWE-295

Description

maclof kubernetes-client 0.17.0 before 0.32.0 disables TLS certificate verification in parseKubeconfig() and parseKubeconfigFile() when a kubeconfig lacks certificate-authority-data, ignoring insecure-skip-tls-verify. On-path attackers can impersonate the Kubernetes API server to capture Bearer tokens or Basic credentials and tamper with WebSocket or REST API traffic.

Affected products

• maclof kubernetes-client: from 0.17.0 before 0.32.0 — fixed in 0.32.0

How to fix

Upgrade to a fixed version: maclof kubernetes-client 0.32.0. Check the vendor advisory for mitigations.

References

• https://github.com/maclof/kubernetes-client
• https://github.com/maclof/kubernetes-client/blob/0.31.0/src/Client.php#L309-L312
• https://github.com/maclof/kubernetes-client/commit/924c0b935fa538ed6b4b0948127609e99d0e6f34
• https://github.com/maclof/kubernetes-client/issues/135
• https://github.com/maclof/kubernetes-client/releases/tag/0.32.0
• https://www.vulncheck.com/advisories/maclof-kubernetes-client-0.17.0-before-0.32.0-disabled-tls-certificate-verification

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