CVE-2026-109434
CVE-2026-109434 · Sleipnir Browser < 3.9.0 Fullscreen Address Bar Spoofing
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Fenrir Sleipnir Browser for Android before 3.9.0 contains a UI spoofing vulnerability that 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. Attackers can render a counterfeit address bar showing a trusted origin over attacker-controlled content after a single user tap, enabling credential harvesting, malware delivery, or social engineering through fake login, update, or payment pages.
CVSS 5.1 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Affected products and versions
sleipnir mobile for android
- Versions
- ≥ 0, < 3.9.0: Affected (semver)
Update to 3.9.0