Vulnerabilities CVE-2026-45150

CVE-2026-45150

Medium

Open

TLP:CLEAR

Zen Browser - Missing Fullscreen Security Notification Allows Origin Spoofing

NVD CVE.org

Critical Infrastructure Phishing Data Exfiltration

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Description

Zen is a firefox-based browser. Prior to 1.19.13b, Zen Browser did not provide a persistent, clearly visible security notification when a webpage entered fullscreen mode, allowing an attacker-controlled page to hide the real browser UI and origin information, imitate a trusted website UI, and combine with long-domain URL eliding to spoof a trusted origin for phishing and credential theft. This issue is fixed in version 1.19.13b.

Details

CVSS Score: 6.3
EPSS Score ⓘ: 0.25%

16.8th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Confidence: 90%
Published: Jul 15, 2026
Last Modified: Jul 15, 2026

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