Information disclosure in Firefox for Android and Firefox Focus for Android - CVE-2026-18809
Published: August 5, 2026
Vulnerability identifier: #VU140966
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-18809
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an unspecified error. A remote attacker can trick the victim into visiting a specially crafted webpage and gain access to sensitive information.
Affected software
Firefox for Android
Firefox Focus for Android
Firefox Focus for Android
How to mitigate CVE-2026-18809
Install updates from vendor's website.
Firefox for Android - update to 153.0.3
Firefox Focus for Android - update to 153.0.3
Firefox Focus for Android - update to 153.0.3