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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-50166
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-15 15:17:16 UTC
Updated2026-09-30 17:43:24 UTC
DescriptionKuma 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.

Risk And Classification

Primary CVSS: v4.0 5.5 MEDIUM from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002750000 probability, percentile 0.180280000 (date 2026-10-02)

Problem Types: CWE-295 | CWE-295 CWE-295: Improper Certificate Validation

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.5MEDIUMCVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/C...
4.0CNADECLARED5.5MEDIUMCVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Attack Requirements
Present
Privileges Required
None
User Interaction
Passive
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
High

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kumahq Kuma affected < 2.7.26 Not specified

References

ReferenceSourceLinkTags
github.com/kumahq/kuma/commit/bb56ae628753aaec1f7846a514ab4edc35c0b569 [email protected] github.com
github.com/kumahq/kuma/commit/d4ae0c0151596be991897651f20c5cdf32de1980 [email protected] github.com
github.com/kumahq/kuma/security/advisories/GHSA-v95x-xhq5-4929 [email protected] github.com
github.com/kumahq/kuma/commit/2d0fb382924598f8746bc85c896f50384675940f [email protected] github.com
github.com/kumahq/kuma/commit/85716397ffa404234bf365da0967eca0b0fa1870 [email protected] github.com
github.com/kumahq/kuma/commit/a256af4869ae7e0ebbc2a14dc231e04ac8df1ba3 [email protected] github.com
github.com/kumahq/kuma/commit/eb81494c2c7a5536e55c19cdde51b02a03b51e11 [email protected] github.com
github.com/kumahq/kuma/pull/16777 [email protected] github.com
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