CVE-2026-105223 maclof kubernetes-client 0.17.0 before 0.32.0 Disabled TLS Certificate Verification
An on-path attacker can intercept Kubernetes API traffic and steal credentials because the client library incorrectly disables TLS verification when certificate data is missing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105223?
CVE-2026-105223 is a critical vulnerability in maclof kubernetes-client, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-295
Which versions are affected by CVE-2026-105223?
How do I fix CVE-2026-105223?
No fix has been published for CVE-2026-105223 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105223 being exploited?
There is no known exploitation of CVE-2026-105223 in the wild and no public exploit code.
Sources
Also known as GHSA-52r7-jqcr-m8h9.