CVE Catalog

CVE-2026-86550

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

19th percentile - higher than 19% of all known CVEs

Summary

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.

Risk Assessment

An attacker can execute arbitrary script in the context of any website, potentially leading to data theft, session hijacking, or other malicious actions on behalf of the user.

Recommendation

Update NuBrowser to a version that includes the protocol validation fix. Additionally, consider restricting browser usage to trusted sources.

Related vulnerabilities

Original NVD description (English source)

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.

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