Envoy Gateway: Nil-dereference when SecurityPolicy targets TCPRoute without spec.authorization
GHSA-m2v6-2jmh-4c68 · BIT-envoy-gateway-2026-53719 · CVE-2026-53719 · GO-2026-6009
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Description
Vulnerability report without repro case. Repro case may be added later after harness is complete.
Preconditions (4):
- Tenant has SecurityPolicy + TCPRoute RBAC (baseline)
- Tenant namespace permitted to attach TCPRoute to a Gateway listener
- spec.authorization omitted (the trigger)
- No admission webhook blocks the shape
Description:
A namespace-scoped tenant can deterministically panic the gatewayapi runner on every reconcile with a single CRD; the recover() in message/watchutil.go:53 keeps the process alive but unwinds the entire handle() callback in runner/runner.go:192, so xDS/Infra IR publishing stalls controller-wide until an admin deletes the object. Data plane keeps serving last-good config.
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