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CVE-2026-25150

🚨 CRITICAL

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 functio...

Published
Feb 03, 2026
Last Modified
Feb 10, 2026
Views
5
Bookmarks
0

Description

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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 Products (1)

qwik - qwik

Version: *

CVSS Scores

CVSS 3.1 9.3
9.3
CRITICAL
CVSS 2.0 9.3

References

github.com github.com

Additional Information

Source
security-advisories@github.com
State
Analyzed

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