Spoofing attack in Firefox for iOS - CVE-2026-9078
Published: May 25, 2026
Vulnerability identifier: #VU132257
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-9078
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for iOS
Firefox for iOS
Detailed vulnerability description
The vulnerability allows a remote attacker to spoof a trusted origin.
The vulnerability exists due to improper rendering of right-to-left and internationalized domain names in link preview UI surfaces when displaying a specially crafted hostname. A remote attacker can provide a specially crafted link to spoof a trusted origin.
How to mitigate CVE-2026-9078
Install security update from vendor's website.