CVE-2026-35621: OpenClaw: Gateway operator.write Can Reach Admin-Class Channel Allowlist Persistence via chat.send

The shared /allowlist command persists channel authorization config through writeConfigFile(...) but does not re-validate gateway client scopes for internal gateway callers. Because chat.send is intentionally reachable to operator.write callers and still creates a generic command-authorized internal context, an authenticated write-scoped gateway client can indirectly mutate channel allowFrom and groupAllowFrom policy that direct config.patch correctly reserves to operator.admin.

This is not just a generic code smell. The current code already shows the intended boundary by adding sink-side internal admin checks to shared /config and /plugins writes, but /allowlist was left behind.