CVE Catalog

CVE-2026-78997

CriticalCVSS 9.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.15%

5th percentile - higher than 5% of all known CVEs

Summary

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.

Risk Assessment

The risk for the organization includes potential theft of credentials, user sessions, and account takeover in the context of visited websites, which may lead to confidentiality and integrity breaches.

Recommendation

It is recommended to immediately update UC Browser to the latest available version that contains a fix for this vulnerability. Additionally, users should be informed about the risk of clicking links from untrusted sources.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS