CVE-2026-25148
Unknown Unknown - Not Provided
Cross-Site Scripting in Qwik.js Server-Side Rendering

Publication date: 2026-02-03

Last updated on: 2026-02-10

Assigner: GitHub, Inc.

Description
Qwik is a performance focused javascript framework. Prior to version 1.19.0, a Cross-Site Scripting vulnerability in Qwik.js' server-side rendering virtual attribute serialization allows a remote attacker to inject arbitrary web scripts into server-rendered pages via virtual attributes. Successful exploitation permits script execution in a victim's browser in the context of the affected origin. This issue has been patched in version 1.19.0.
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Meta Information
Published
2026-02-03
Last Modified
2026-02-10
Generated
2026-06-16
AI Q&A
2026-02-04
EPSS Evaluated
2026-06-15
NVD
CVE-2026-25148
EUVD
EUVD-2026-5166
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
qwik qwik to 1.19.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a Cross-Site Scripting (XSS) issue in the Qwik JavaScript framework prior to version 1.19.0. It occurs in the server-side rendering process where virtual attribute serialization is handled. A remote attacker can exploit this flaw by injecting arbitrary web scripts into server-rendered pages through these virtual attributes. When a victim visits the affected page, the malicious script executes in their browser within the context of the vulnerable site.

Impact Analysis

Exploitation of this vulnerability allows an attacker to run arbitrary scripts in the browser of users visiting the affected site. This can lead to theft of sensitive information such as cookies or session tokens, unauthorized actions performed on behalf of the user, defacement of the website, or distribution of malware. Essentially, it compromises the security and trustworthiness of the web application and can negatively affect users' privacy and data security.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, update Qwik.js to version 1.19.0 or later, where the Cross-Site Scripting issue has been patched.

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