CVE-2026-18674: Kong Inc Kong Mesh

High severity, CVSS 7.0. EPSS: 0.6% chance of exploitation in the next 30 days.

On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone. The result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide. The root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.

Affected products

• Kong Inc Kong Mesh: before 2.7.29 (fixed in 2.7.29); from 2.8.0, before 2.9.19 (fixed in 2.9.19); from 2.10.0, before 2.11.18 (fixed in 2.11.18); from 2.12.0, before 2.12.14 (fixed in 2.12.14); from 2.13.0, before 2.13.10 (fixed in 2.13.10); from 2.14.0, before 2.14.2 (fixed in 2.14.2)

Published 2026-08-17. Last modified 2026-08-31.