CVE-2026-86853

Published: Sep 8, 2026Modified: Sep 8, 2026

4.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploitability: 2.8 / Impact: 1.4

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

A malicious webpage could repeatedly trigger external URL schemes, causing system prompts or external application launches. This could make Firefox for iOS temporarily unusable until the page is closed. This vulnerability was fixed in Firefox for iOS 155.1.

Related CWEs

CWE-451

User Interface (UI) Misrepresentation of Critical Information

The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks.

References (2)

https://bugzilla.mozilla.org/show_bug.cgi?id=1847631

Source: security@mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-89/

Source: security@mozilla.org

Timeline

No history available yet.