🛡️ CVE-2026-50166 — kuma

⚪ Unknown ✅ No Known Exploit CWE-295 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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

Impact

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

Affected configurations

  • kumactl profiles manually added against an HTTPS control plane endpoint without --ca-cert-file

Not affected

  • The default local profile, which uses plain HTTP

Workarounds

When adding an HTTPS control plane profile to kumactl, always pass --ca-cert-file pointing at the control plane's serving CA. Alternatively, terminate the control plane behind a publicly trusted certificate; the patched releases will verify successfully against the operating system trust store with no further configuration

Resources

  • Fix: https://github.com/kumahq/kuma/pull/16777

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability none.

Weakness class

CVE-2026-50166 is classified as CWE-295: Improper Certificate Validation. A TLS certificate is accepted without proper verification, so a man-in-the-middle can present their own.

Affected software

CVE-2026-50166 is recorded against 2 packages.

  • github.com/kumahq/kuma
  • github.com/kumahq/kuma/v2

Timeline and source

Published on 16 July 2026 and last revised on 22 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Web)
github.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS 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
CWE CWE-295
Public Exploit ✅ No
Source OSV
Published 2026-07-16
Updated 2026-08-12
Modified 2026-07-22

Affected Packages

Software From version Fixed in
github.com/kumahq/kuma — —
github.com/kumahq/kuma/v2 — —

Similar Threats

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