CVE-2026-18675 — Kong Mesh: control plane denial of service via a malformed dataplane token with a non-string JWT kid
The dataplane token validator in kuma-cp performs an unchecked Go type assertion on the JWT kid header. A token whose kid is a JSON number decodes as a float64 and triggers a ru…
Published: 2026-08-12 · CVSS: 5.3 · CVSS 4.0
The dataplane token validator in kuma-cp performs an unchecked Go type assertion on the JWT kid header. A token whose kid is a JSON number decodes as a float64 and triggers a runtime panic before any signature, claims, or authorization check runs. The panic terminates the entire kuma-cp process, HTTP API, the health and readiness endpoints, and xDS. Unauthenticated access to the dataplane gRPC server can trigger the crash with a malformed token A single request is a transient interruption; sustaining an outage requires repeated requests.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7