CVE-2026-50166 Kuma: kumactl connects to control plane without verifying TLS certificate when no CA is configured
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-50166?
CVE-2026-50166 is a medium-severity vulnerability in kumahq kuma, published on 15 Sep 2026.
Official description
Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.26, 2.9.16, 2.11.14, 2.12.11, and 2.13.7, a kumactl profile manually configured for an HTTPS control plane without --ca-cert-file disables TLS peer verification and sends API tokens over the unverified connection. An attacker on the network path can intercept user or administrator API tokens and act against the control plane as the compromised user. The default local profile is unaffected because it uses plain HTTP. This issue is fixed in versions 2.7.26, 2.9.16, 2.11.14, 2.12.11, and 2.13.7.
Weakness: CWE-295
Which versions are affected by CVE-2026-50166?
How do I fix CVE-2026-50166?
Upgrade to a fixed version.
Is CVE-2026-50166 being exploited?
There is no known exploitation of CVE-2026-50166 in the wild and no public exploit code.