VulnerabilityDeferred

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.

MEDIUM 6.5EPSS 0.27%

Does this matter?

Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS: 0.27% probability · 19th percentile
CISA KEV: Not listed
Weakness: CWE-79
Source: psirt@zte.com.cn

References

https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/874505866159006721

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.