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CVE-2026-78997 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CNA: CISA-ADPCVSS-B:9.3 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://gist.github.com/OmriInbar-Novee/9fd65fe08c1b1cff6a19350e44425de2	CISA-ADP	ExploitTechnical Analysis
https://gist.github.com/OmriInbar-Novee/9fd65fe08c1b1cff6a19350e44425de2	[email protected]	ExploitTechnical Analysis
https://gist.github.com/OmriInbar-Novee/ef7a92db148b2eb1ab0aa7b99a565c4c	[email protected]	Technical Description

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	CISA-ADP

Affected Products

Product	Versions
UC Browser	13.7.8.1314
CPE cpe:2.3:a:ucweb:uc_browser::::::android::* Remediation No remediation found in references.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 9, 2026	CVE Modified	CISA-ADP
Sep 8, 2026	New CVE Received	[email protected]