---
id: CVE-2026-86550
title: >-
  NuBrowser lacks protocol whitelist validation for the S.browser_fallback_url
  field of intent://, allowing attackers to inject javascript: URLs via 302
  redirects
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 …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'
cwe:
  - CWE-79
vendor: ZTE
product: NebulaOS
affected:
  - NebulaOS Versions prior to Browser V1.6.8
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:52:04.827'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86550'
references:
  - url: >-
      https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/874505866159006721
    label: psirt@zte.com.cn
tags:
  - nvd
  - cve.org
epss: 0.00461
epssPercentile: 0.37322
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T12:23:54.690255Z'
ingestedAt: '2026-09-08T15:33:26.983Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.