CVE-2026-86550CWE-79cross-site-scripting
CVE-2026-86550
Medium · published September 8, 2026
What it is
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.
The record
Technical detail
- CVSS v3.1
- 6.5 · MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- CVSS v4.0
- Not supplied
- EPSS
- 0.00461 · 39.0th percentile
- Weakness
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- Published
- 2026-09-08T13:18Z
References (1)
EPSS history
Timeline