Firefox iOS <147.4 Desync Address Bar Attack (CVE-2026-2634)
CVE-2026-2634 Published on February 24, 2026
Spoofed web content presented under trusted domains using scripted navigation on Firefox iOS
Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed domains. This vulnerability affects Firefox for iOS < 147.4.
Vulnerability Analysis
CVE-2026-2634 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
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.
Products Associated with CVE-2026-2634
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Affected Versions
Mozilla Firefox for iOS:- Version unspecified and below 147.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.