CVE-2026-18675 | BDVDB-2026-358285 Detail
KongKong Mesh
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.
Impact#
Denial of Service
Weaknesses#
References#
- https://github.com/kumahq/kuma/security/advisories/GHSA-5mxq-7xq4-3vx8
- https://github.com/kumahq/kuma/pull/17465
- https://github.com/kumahq/kuma/pull/17468
- https://github.com/kumahq/kuma/pull/17467
- https://github.com/kumahq/kuma/pull/17471
- https://github.com/kumahq/kuma/pull/17469
- https://github.com/kumahq/kuma/pull/17470
- https://github.com/kumahq/kuma/pull/17472
- https://developer.konghq.com/mesh/changelog/
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.