CVE-2026-2634 | Malicious scripts could cause desynchronization between the … | CVSS 9.8 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.

Metadata

CVE ID: CVE-2026-2634
State: PUBLISHED
Assigner: mozilla
Reserved: 2026-02-17 18:31 UTC
Published: 2026-02-24 13:33 UTC
Last updated: 2026-04-13 13:53 UTC
Primary CWE: CWE-451
CWE-451 User Interface (UI) Misrepresentation of Critical In…
Vendor / Product: Mozilla / Firefox for iOS
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Mozilla	Firefox for iOS	—	147.4 ≤ *

Weakness (CWE)

CWE	Source	Description
CWE-451	adp	CWE-451 User Interface (UI) Misrepresentation of Critical Information

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (2)