CVE-2026-18678
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
When an operator adds an HTTPS control plane profile to kumactl without providing a CA certificate, kumactl disables TLS verification and sends API tokens over the unverified connection.
Risk Assessment
An attacker on the network path can intercept user or admin API tokens and then act against the control plane as that user.
Recommendation
Always provide a CA certificate when configuring kumactl for HTTPS control planes.
Original NVD description (English source)
When an operator adds an HTTPS control plane profile to kumactl without providing a CA certificate, kumactl disables TLS verification and sends API tokens over the unverified connection. An attacker on the network path between the operator and the control plane can intercept user or admin API tokens and then act against the control plane as that user.