CVE-2026-18679

medium

Description

When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled, and the dataplane authentication token is sent over that unverified connection. An on-path actor can intercept the dataplane authentication token and impersonate the control plane to the data plane, injecting a forged bootstrap configuration and taking over the proxy.

References

https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv

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

https://developer.konghq.com/mesh/changelog/

Details

Source: Mitre, NVD

Published: 2026-08-12

Updated: 2026-08-31

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 9.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: Critical

CVSS v4

Base Score: 5.8

Vector: CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

Severity: Medium

EPSS

EPSS: 0.00119