Prototype pollution in Qwik - CVE-2026-25150
Published: February 6, 2026
Vulnerability identifier: #VU122438
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-25150
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Builder.io
Affected software:
Qwik
Qwik
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to improper input validation in the formToObj() function within @builder.io/qwik-city middleware. A remote attacker can pass specially crafted input to the application and perform prototype pollution, which can result in privilege escalation and denial of service (DoS) condition.
How to mitigate CVE-2026-25150
Install updates from vendor's website.