Skip to content
OpenAdvisories
Medium · 5.3 CVE-2026-25148 EUVD-2026-5166GHSA-m6jq-g7gq-5w3c

Qwik SSR XSS via Unsafe Virtual Node Serialization

Published Feb 3, 2026 · Updated Feb 4, 2026 · Assigned by GitHub_M

Description

Qwik is a performance focused javascript framework. Prior to version 1.19.0, a Cross-Site Scripting vulnerability in Qwik.js' server-side rendering virtual attribute serialization allows a remote attacker to inject arbitrary web scripts into server-rendered pages via virtual attributes. Successful exploitation permits script execution in a victim's browser in the context of the affected origin. This issue has been patched in version 1.19.0.

Affected products

VendorProductAffectedFixed
QwikDev qwik < 1.19.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @builder.io/qwik-city < 1.19.0 1.19.0 GHSA-m6jq-g7gq-5w3c

References