CVE-2026-25150
Critical · 9.3CVSS
9.3
EPSS
0.7%
Published
Feb 3, 2026
CISA due date
—
The record
Qwik is a performance focused javascript framework. Prior to version 1.19.0, a prototype pollution vulnerability exists in the formToObj() function within @builder.io/qwik-city middleware. The function processes form field names with dot notation (e.g., user.name) to create nested objects, but fails to sanitize dangerous property names like __proto__, constructor, and prototype. This allows unauthenticated attackers to pollute Object.prototype by sending crafted HTTP POST requests, potentially leading to privilege escalation, authentication bypass, or denial of service. This issue has been patched in version 1.19.0.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | @builder.io/qwik-city | 0 | 1.19.0 |
Related vulnerabilities
- GHSA-xqg6-98cw-gxhq Prototype Pollution via FormData Processing in Qwik City Same vulnerability
- GHSA-whhv-gg5v-864r Qwik City has array method pollution in FormData processing allows type confusion and DoS Also affects @builder.io/qwik-city
- CVE-2026-32701 Qwik is a performance-focused JavaScript framework. Also affects @builder.io/qwik-city
- CVE-2026-25151 Qwik is a performance focused javascript framework. Also affects @builder.io/qwik-city
- CVE-2026-25148 Qwik is a performance focused javascript framework. Also affects @builder.io/qwik-city
- CVE-2026-25155 Qwik is a performance focused javascript framework. Also affects @builder.io/qwik-city
- CVE-2026-25149 Qwik is a performance focused javascript framework. Also affects @builder.io/qwik-city
- GHSA-vm6g-8r4h-22x8 Qwik City CSRF protection middleware does not work properly for content type header with… Also affects @builder.io/qwik-city