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Vulnerability · Published Aug 17, 2026 · Assigned by Kong

CVE-2026-18674Kong Mesh multi-zone: the global control plane attributes KDS-synced resources by an unvalidated in-band zone identifier

High 7.0

In plain English

A high-severity insufficient verification of data authenticity in Kong Mesh from Kong Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 4.0)7.0High
Exploit odds (30 days)0.6%top 53.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 (as reported)

VendorProductVersions
Kong Inc. Kong Mesh 0 – before 2.7.292.8.0 – before 2.9.192.10.0 – before 2.11.182.12.0 – before 2.12.142.13.0 – before 2.13.102.14.0 – before 2.14.2

Weakness: CWE-345, CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:N

References