CVE-2026-18679

Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate when no CA is configured

State: Published
Severity: 5.8 Medium
Published: Aug 12, 2026
Updated: Aug 13, 2026
Reserved: Aug 3, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.8 Medium	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	Kong

Weaknesses

CWE-295 Improper Certificate Validation

Affected Products

Product	Versions
Kong MeshKong Inc.	before 2.7.26Affected 2.8.0 to before 2.9.16Affected 2.10.0 to before 2.11.14Affected 2.12.0 to before 2.12.11Affected 2.13.0 to before 2.13.7Affected

References

Upstream advisory GHSA-wvmp-6r4v-j6cvvendor-advisory
kumahq/kuma#16777 (master)patch
Kong MESH Changelogrelease-notes

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