OpenClaw's LINE Webhook Flaw: How Missing Concurrency Limits Enable DoS Attacks

OpenClaw's LINE webhook handler fails to enforce concurrency limits before processing unauthenticated requests, allowing attackers to trigger massive Denial of Service attacks with minimal effort. This vulnerability exposes a fundamental gap in pre-authentication resource protection that puts production OpenClaw deployments at severe risk. Immediate patching to version 2026.3.31 is critical to prevent service disruption.