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

published 2026-02-03 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5167 , GHSA-r666-8gjf-4v5f

cvss: 5.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

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.

Patch / fix

fixed in 2 links 1

npm @builder.io/qwik-city 1.19.0
qwik qwik 1.19.0

github.com/QwikDev/qwik@eebf610 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 9 mo ago (2026-02-04)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
GitHub	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	@builder.io/qwik-city	<1.19.0	1.19.0

Affected products

QwikDev qwik

Classification

Weakness

CWE-352 Cross-Site Request Forgery

References

github.com /QwikDev/qwik/commit/eebf610e04cc3a690f11e10191d09ff0fca1c7ed
web, patch
github.com /QwikDev/qwik/security/advisories/GHSA-r666-8gjf-4v5f
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-25151
advisory
github.com /QwikDev/qwik
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary