Fenrir CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

MEDIUM Fenrir CVE published 2026-10-19

CVE-2026-109434

The CVE-2026-109434 vulnerability in Sleipnir Browser for Android before version 3.9.0 allows remote attackers to impersonate the browser's trusted address bar by entering fullscreen mode via the Fullscreen API without displaying a persistent notification or trusted-origin indicator. This UI spoofing vulnerability can lead to credential harvesting, malware delivery, or social engineering through fake logi [truncated]