CVE-2026-45150 — Zen Browser - Missing Fullscreen Security Notification Allows Origin Spoofing
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, allowi…
Published: 2026-07-15 · CVSS: 6.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7