Prototype pollution in Qwik - CVE-2026-25150
Published: February 6, 2026
Vulnerability identifier: #VU122438
CSH Severity: High
CVSS v4: 8.8 [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]
CVE-ID: CVE-2026-25150
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Qwik
How to mitigate CVE-2026-25150
Install updates from vendor's website.
Qwik - update to 1.19.0