SB2026020668 - Multiple vulnerabilities in Qwik
Published: February 6, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Cross-site request forgery (CVE-ID: CVE-2026-25151)
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to server-side request handler inconsistently interprets HTTP request headers. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.
2) Open redirect (CVE-ID: CVE-2026-25149)
The vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
3) Cross-site scripting (CVE-ID: CVE-2026-25148)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in server-side rendering virtual attribute serialization. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
4) Prototype pollution (CVE-ID: CVE-2026-25150)
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.
Remediation
Install update from vendor's website.