CVE-2026-27971 is a CVSS 9.8 unauthenticated RCE in Qwik’s server$ RPC mechanism, exploitable via a single crafted HTTP request with no credentials or user interaction required. CISA KEV listing and VulnCheck KEV both confirm active exploitation, and the EPSS score places this at the 95.9th percentile for exploitation likelihood. Any organization running Qwik <= 1.19.0 in a Node.js environment should treat this as an emergency: patch to 1.19.1 immediately or apply WAF controls to block server$ RPC paths as an interim measure.