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CVE-2026-78997

UC Browser for Android (package com.UCMobile.intl, version 13.7.8.1314) contains a Universal Cross-Site Scripting vulnerability that allows

Published
Last modified
published
Not listed in CISA KEV
1 proof of concept on GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • n/a n/a

    Version range not reported

References 3

gist.github.com

GitHub · Hunt-Benito/the-callback-that-outlived-the-page-cve-2026-78997-uc-browser-android-universal-xss