Description
This vulnerability allowed a site to enter fullscreen, after a user click, without a full-screen notification (toast) appearing. Without this notification, users could potentially be misled about what site they were on if a malicious site renders a fake UI (like a fake address bar.)
Scores
CVSS v3
7.4
EPSS
0.0003
EPSS Percentile
8.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1021
Status
published
Products (1)
The Browser Company of New York/Dia
< 1.6.0
Published
Nov 21, 2025
Tracked Since
Feb 18, 2026