CVE-2026-86550
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.
- Published Sep 8, 2026
- CVSS 6.5 medium
- 0.5% chance of exploitation in the next 30 days (EPSS)