CVE-2026-50166

Kuma: kumactl connects to control plane without verifying TLS certificate when no CA is configured

Published Sep 15, 2026 CVSS 4.0 · 5.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-v95x-xhq5-4929 kumactl connects to control plane without verifying TLS certificate when no CA is configured
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Kumahq
Kumahq kuma
Vendors & Products Kumahq
Kumahq kuma
Type Values Removed Values Added
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.
Title Kuma: kumactl connects to control plane without verifying TLS certificate when no CA is configured
Weaknesses CWE-295
References
Metrics cvssV4_0

{'score': 5.5, 'vector': 'CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 16, 2026, 3:50 PM
Reserved
Jun 3, 2026, 8:54 PM
Status
Awaiting Analysis
Published
Sep 15, 2026, 3:17 PM
Modified
Sep 30, 2026, 5:43 PM