CVE-2026-27971: Qwik

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Qwik is a performance focused javascript framework. qwik <=1.19.0 is vulnerable to RCE due to an unsafe deserialization vulnerability in the server$ RPC mechanism that allows any unauthenticated user to execute arbitrary code on the server with a single HTTP request. Affects any deployment where require() is available at runtime. This vulnerability is fixed in 1.19.1.

Affected products

• Qwik Qwik: before 1.19.1 (fixed in 1.19.1)

Published 2026-03-03. Last modified 2026-06-17.