UC Browser for Android (package com.UCMobile.intl, version 13.7.8.1314) contains a Universal Cross-Site Scripting vulnerability that allows an attacker to execute arbitrary JavaScript in the context of any origin. An attacker hosts a specially crafted URL on a UC-owned domain (via a reflected XSS) that leverages the browser's internal JavaScript bridge to register a deferred callback, navigate the tab to a victim site, and then execute attacker-controlled code on that site when a login dialog is dismissed.
History

Thu, 10 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
Title Universal Cross‑Site Scripting in UC Browser for Android Enabling Remote Code Execution

Wed, 09 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
Title Universal Cross‑Site Scripting in UC Browser for Android Enabling Remote Code Execution
Weaknesses CWE-79

Tue, 08 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
Description UC Browser for Android (package com.UCMobile.intl, version 13.7.8.1314) contains a Universal Cross-Site Scripting vulnerability that allows an attacker to execute arbitrary JavaScript in the context of any origin. An attacker hosts a specially crafted URL on a UC-owned domain (via a reflected XSS) that leverages the browser's internal JavaScript bridge to register a deferred callback, navigate the tab to a victim site, and then execute attacker-controlled code on that site when a login dialog is dismissed.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-08T00:00:00.000Z

Updated: 2026-09-09T18:15:57.455Z

Reserved: 2026-08-25T00:00:00.000Z

Link: CVE-2026-78997

cve-icon Vulnrichment

Updated: 2026-09-09T18:14:38.446Z

cve-icon NVD

Status : Deferred

Published: 2026-09-08T17:18:31.020

Modified: 2026-09-09T19:17:47.723

Link: CVE-2026-78997

cve-icon Redhat

No data.