CVE-2026-86550
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Sep 08, 2026
Vendor
unknown
Description
NuBrowser lacks protocol whitelist validation for the S.browser_fallback_url field of intent://, allowing attackers to inject javascript: URLs via 302 redirects. This results in a universal cross‑site scripting (UXSS) vulnerability that enables script execution within the origin of arbitrary websites.