CVE-2026-77115: CWE-79 Cross-Site Scripting (XSS) in Brave
CVE-2026-77115 is a cross-site scripting (XSS) vulnerability in Brave Popup Builder up to version 0.8.5. It occurs because UTM query parameters are reflected into popup form HTML without proper escaping. This can allow injection of malicious scripts in affected versions.
AI Analysis
Technical Summary
Brave Popup Builder (brave-popup-builder) versions prior to 0.8.6 improperly handle UTM query parameters by reflecting them into popup form HTML without escaping. This results in a CWE-79 Cross-Site Scripting (XSS) vulnerability, which could allow an attacker to inject and execute arbitrary scripts in the context of the affected application.
Potential Impact
The vulnerability allows injection of malicious scripts via UTM query parameters, potentially leading to script execution in the user's browser when interacting with the popup form. This could be leveraged to perform actions such as session hijacking or defacement within the affected application context.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Users should monitor the vendor advisory for updates and apply any future patches promptly. Until then, avoid using vulnerable versions or sanitize UTM parameters externally if possible.
CVE-2026-77115: CWE-79 Cross-Site Scripting (XSS) in Brave
Description
CVE-2026-77115 is a cross-site scripting (XSS) vulnerability in Brave Popup Builder up to version 0.8.5. It occurs because UTM query parameters are reflected into popup form HTML without proper escaping. This can allow injection of malicious scripts in affected versions.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Brave Popup Builder (brave-popup-builder) versions prior to 0.8.6 improperly handle UTM query parameters by reflecting them into popup form HTML without escaping. This results in a CWE-79 Cross-Site Scripting (XSS) vulnerability, which could allow an attacker to inject and execute arbitrary scripts in the context of the affected application.
Potential Impact
The vulnerability allows injection of malicious scripts via UTM query parameters, potentially leading to script execution in the user's browser when interacting with the popup form. This could be leveraged to perform actions such as session hijacking or defacement within the affected application context.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Users should monitor the vendor advisory for updates and apply any future patches promptly. Until then, avoid using vulnerable versions or sanitize UTM parameters externally if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-20T12:17:33.040Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8a91afacd9273b49900c7d
Added to database: 08/23/2026, 06:22:39 UTC
Last enriched: 08/23/2026, 06:37:06 UTC
Last updated: 08/23/2026, 06:37:06 UTC
Views: 4
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