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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-18675

Kong Mesh: control plane denial of service via a malformed dataplane token with a non-string JWT kid

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Status
Published
Published
Updated
Assigning organization
Kong

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Kong Inc. Kong Mesh

Default version status: unaffected

  • 0 to < 2.7.29affected
  • 2.8.0 to < 2.9.19affected
  • 2.10.0 to < 2.11.18affected
  • 2.12.0 to < 2.12.14affected
  • 2.13.0 to < 2.13.10affected
  • 2.14.0 to < 2.14.2affected

References