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Medium · 5.9 CVE-2026-25151 EUVD-2026-5167GHSA-r666-8gjf-4v5f

Qwik City has a CSRF Protection Bypass via Content-Type Header Validation

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, Qwik City’s server-side request handler inconsistently interprets HTTP request headers, which can be abused by a remote attacker to circumvent form submission CSRF protections using specially crafted or multi-valued Content-Type headers. 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-r666-8gjf-4v5f

References