CVE-2026-2634

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

Critical · published February 24, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
43.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00522 · 43.5th percentile
Published
2026-02-24T13:33Z
EPSS history
Timeline
  • 24 FEB 13:33Z
    Spoofed web content presented under trusted domains using scripted navigation on Firefox iOS
    cvelistv5