CVE-2026-25151: Qwik City has a CSRF Protection Bypass via Content-Type Header Validation

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-03 · updated 2026-06-17
Weakness: CWE-352

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

QwikDev qwik: before 1.19.0 — fixed in 1.19.0

How to fix

Upgrade to a fixed version: QwikDev qwik 1.19.0. Check the vendor advisory for mitigations.

References

https://github.com/QwikDev/qwik/commit/eebf610e04cc3a690f11e10191d09ff0fca1c7ed
https://github.com/QwikDev/qwik/security/advisories/GHSA-r666-8gjf-4v5f

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