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NVD Vulnerability Details :

CVE-2026-2634

Modified

Source-security@mozilla.org

Published At-24 Feb, 2026 | 14:16

Updated At-27 Feb, 2026 | 21:16

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Primary	3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Secondary	3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Type: Primary

Version: 3.1

Base score: 9.8

Base severity: CRITICAL

Vector:

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

Type: Secondary

Version: 3.1

Base score: 9.8

Base severity: CRITICAL

Vector:

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

CPE Matches

Mozilla Corporation

>>firefox>>Versions before 147.4(exclusive)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:iphone_os:*:*

Weaknesses

CWE ID	Type	Source
NVD-CWE-noinfo	Primary	nvd@nist.gov
CWE-451	Secondary	134c704f-9b21-4f2e-91b3-4a467353bcc0

CWE ID: NVD-CWE-noinfo

Type: Primary

Source: nvd@nist.gov

CWE ID: CWE-451

Type: Secondary

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

References

Hyperlink	Source	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1975529	security@mozilla.org	Issue Tracking Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-12/	security@mozilla.org	Vendor Advisory

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

Source: security@mozilla.org

Resource:

Issue Tracking

Permissions Required

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

Source: security@mozilla.org

Resource:

Vendor Advisory

CISA Catalog

Metrics

CPE Matches

Weaknesses

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References

Change History