CVE-2026-25150— Prototype Pollution via FormData Processing in Qwik City
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I. Basic Information for CVE-2026-25150
Vulnerability Information
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Vulnerability Title
Prototype Pollution via FormData Processing in Qwik City
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
Qwik 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Qwik是Qwik Dev开源的一款微型Web框架。 Qwik 1.19.0之前版本存在安全漏洞，该漏洞源于formToObj函数存在原型污染漏洞，可能导致未经身份验证的攻击者污染Object.prototype，引发权限提升、身份验证绕过或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
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Affected Products
II. Public POCs for CVE-2026-25150
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Same Patch Batch · QwikDev · 2026-02-03 · 5 CVEs total
| CVE-2026-25151 | 5.9 MEDIUM | Qwik City has a CSRF Protection Bypass via Content-Type Header Validation |
| CVE-2026-25155 | 5.9 MEDIUM | [qwik-city] CSRF protection middleware does not work properly for content type header with |
| CVE-2026-25149 | Qwik City Open Redirect via fixTrailingSlash | |
| CVE-2026-25148 | Qwik SSR XSS via Unsafe Virtual Node Serialization |
IV. Related Vulnerabilities
Same product: qwik
- CVE-2026-32701
Qwik has array method pollution in FormData processing, allo - CVE-2026-27971
Qwik affected by unauthenticated RCE via server$ Deserializa - CVE-2026-25148
Qwik SSR XSS via Unsafe Virtual Node Serialization - CVE-2026-25151
Qwik City has a CSRF Protection Bypass via Content-Type Head - CVE-2026-25155
[qwik-city] CSRF protection middleware does not work properl
Same vendor: QwikDev
- CVE-2026-32701
Qwik has array method pollution in FormData processing, allo - CVE-2026-27971
Qwik affected by unauthenticated RCE via server$ Deserializa - CVE-2026-25148
Qwik SSR XSS via Unsafe Virtual Node Serialization - CVE-2026-25151
Qwik City has a CSRF Protection Bypass via Content-Type Head - CVE-2026-25155
[qwik-city] CSRF protection middleware does not work properl
Same weakness: CWE-1321
- CVE-2026-42264
Axios: Prototype pollution read-side gadgets in HTTP adapter - CVE-2026-42232
n8n: XML Node Prototype Pollution to RCE - CVE-2026-42231
n8n: Prototype Pollution in XML Webhook Body Parser Leads to - CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbo - CVE-2026-42033
Axios: Prototype Pollution Gadgets - Response Tampering, Dat
V. Comments for CVE-2026-25150
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