CVE-2026-27971 is a CVSS 9.8 unauthenticated remote code execution vulnerability in the Qwik JavaScript framework’s server$ RPC mechanism, affecting all versions up to and including 1.19.0. The vulnerability is listed on both CISA KEV and VulnCheck KEV, confirming active in-the-wild exploitation; any internet-facing Qwik application is at immediate risk of full server compromise. Immediate action required: upgrade to Qwik 1.19.1 and implement WAF blocking on server$ endpoint paths as an interim control.