Spoofing attack in Mozilla Firefox and Firefox for Android - CVE-2026-118018
Published: October 27, 2026
Vulnerability identifier: #VU158221
CSH Severity: Low
CVSS v4: 5.1 [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]
CVE-ID: CVE-2026-118018
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to spoof download-related information.
The vulnerability exists due to insufficient protection against spoofing in Firefox for Android's Downloads component when presenting download information. A remote attacker can trigger misleading presentation to potentially deceive the victim about a download.
Affected software
Mozilla Firefox
Firefox for Android
Firefox for Android
How to mitigate CVE-2026-118018
Install security update from vendor's website.
Mozilla Firefox - update to 159.0
Firefox for Android - update to 159.0
Firefox for Android - update to 159.0