Information disclosure in Mozilla Firefox and Firefox for Android - CVE-2026-0888
Published: January 13, 2026
Vulnerability identifier: #VU121220
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2026-0888
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 excessive data output by the application in the XML component. A remote attacker can gain unauthorized access to sensitive information on the system.
Affected software
Mozilla Firefox
Firefox for Android
Mozilla Thunderbird
Firefox for Android
Mozilla Thunderbird
How to mitigate CVE-2026-0888
Install updates from vendor's website.
Mozilla Firefox - update to 147.0
Firefox for Android - update to 147.0
Mozilla Thunderbird - update to 147.0
Firefox for Android - update to 147.0
Mozilla Thunderbird - update to 147.0