CVE-2026-2634criticalCWE-451

CVE-2026-2634: critical vulnerability in Mozilla Firefox for iOS

Spoofed web content presented under trusted domains using scripted navigation on Firefox iOS

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 0.4%
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 was fixed in Firefox for iOS 147.4.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Mozilla · Firefox for iOS
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