CVE-2026-78997: n/a
UC Browser for Android version 13.7.8.1314 contains a Universal Cross-Site Scripting (XSS) vulnerability. This flaw allows attackers to execute arbitrary JavaScript code in the context of any origin by leveraging a reflected XSS on a UC-owned domain combined with the browser's internal JavaScript bridge. The attack involves registering a deferred callback, navigating the tab to a victim site, and executing attacker-controlled code when a login dialog is dismissed.
AI Analysis
Technical Summary
CVE-2026-78997 is a Universal Cross-Site Scripting vulnerability in UC Browser for Android (package com.UCMobile.intl, version 13.7.8.1314). The vulnerability arises from a reflected XSS hosted on a UC-owned domain that exploits the browser's internal JavaScript bridge to register a deferred callback. This callback triggers navigation to a victim site and executes attacker-controlled JavaScript code in the context of that site when a login dialog is dismissed, enabling arbitrary script execution across origins.
Potential Impact
An attacker can execute arbitrary JavaScript code in the context of any origin within the affected browser version. This could lead to unauthorized actions on behalf of the user, theft of sensitive information, or other malicious activities within the browser context. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround has been documented. Users and administrators should monitor for vendor updates addressing this vulnerability.
CVE-2026-78997: n/a
Description
UC Browser for Android version 13.7.8.1314 contains a Universal Cross-Site Scripting (XSS) vulnerability. This flaw allows attackers to execute arbitrary JavaScript code in the context of any origin by leveraging a reflected XSS on a UC-owned domain combined with the browser's internal JavaScript bridge. The attack involves registering a deferred callback, navigating the tab to a victim site, and executing attacker-controlled code when a login dialog is dismissed.
Affected software
pkg:apk/uc/uc-browser-androidRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-78997 is a Universal Cross-Site Scripting vulnerability in UC Browser for Android (package com.UCMobile.intl, version 13.7.8.1314). The vulnerability arises from a reflected XSS hosted on a UC-owned domain that exploits the browser's internal JavaScript bridge to register a deferred callback. This callback triggers navigation to a victim site and executes attacker-controlled JavaScript code in the context of that site when a login dialog is dismissed, enabling arbitrary script execution across origins.
Potential Impact
An attacker can execute arbitrary JavaScript code in the context of any origin within the affected browser version. This could lead to unauthorized actions on behalf of the user, theft of sensitive information, or other malicious activities within the browser context. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround has been documented. Users and administrators should monitor for vendor updates addressing this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-08-25T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa03d69acd9273b49f0b3fc
Added to database: 09/08/2026, 16:52:57 UTC
Last enriched: 09/08/2026, 17:08:16 UTC
Last updated: 09/09/2026, 01:20:14 UTC
Views: 9
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