CVE-2026-25150

critical · 9.3

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.

9.3

CVSS

0.6%

EPSS (exploit prob.)

50th

EPSS percentile

2026-02-03

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L

Weaknesses

CWE-1321

Affected products

Vendor	Product	Affected versions
qwik	qwik	< 1.19.0

Check a specific version with /api/v1/cve/match.

References

https://github.com/QwikDev/qwik/commit/5f65bae2bc33e6ca0c21e4cfcf9eae05077716f7
https://github.com/QwikDev/qwik/security/advisories/GHSA-xqg6-98cw-gxhq

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-25150