CVE-2026-2634

critical

Description

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.

References

https://www.mozilla.org/security/advisories/mfsa2026-12/

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8446

https://bugzilla.mozilla.org/show_bug.cgi?id=1975529

Details

Source: Mitre, NVD

Published: 2026-02-24

Updated: 2026-04-13

Named Vulnerability: GHSA-gwgg-r543-4wvw

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.00477