CVE-2026-2634

CRITICAL

9.8

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 affects Firefox for iOS < 147.4.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/24/2026

Last Modified2/27/2026

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefox

Weaknesses (CWE)

CWE-451

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1975529(security@mozilla.org)

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

IOC Correlations

No correlations recorded

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