A CVSS 9.8 unauthenticated remote code execution vulnerability in the Qwik JavaScript framework’s server$ RPC mechanism is confirmed actively exploited per CISA KEV. Any internet-facing Node.js application running Qwik 1.19.0 or earlier is at immediate risk of full server compromise from a single crafted HTTP request. Upgrade to Qwik 1.19.1 immediately; apply WAF rules to server$ endpoints if patching cannot begin within hours.