Information disclosure in Mozilla Firefox and Firefox for Android - CVE-2026-12320
Published: June 16, 2026
Vulnerability identifier: #VU134642
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-12320
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper access control in the Password Manager component when handling stored credentials. A remote attacker can trigger the vulnerable behavior to disclose sensitive information.
How to mitigate CVE-2026-12320
Install security update from vendor's website.