Spoofing attack in Firefox for Android and Mozilla Firefox - CVE-2026-8964
Published: May 19, 2026
Vulnerability identifier: #VU131856
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/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-2026-8964
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for Android
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a remote attacker to spoof trusted content.
The vulnerability exists due to improper UI representation in the Popup Blocker component when displaying popup-related interface content. A remote attacker can present crafted content to spoof trusted content.
How to mitigate CVE-2026-8964
Install security update from vendor's website.