| CVE Number | Vulnerability | Product | Severity | Date |
|---|---|---|---|---|
| CVE-2026-0877 | Mozilla Firefox Mitigation bypass in the DOM: Security component | Mozilla Firefox | High | 05-02-2026 |
Technical Information
An attacker can bypass built-in Document Object Model security components mitigations.
Patch release date: Jan 13, 2026
Further information on this vulnerability is available at : CVE-2026-0877
Affected Software
Firefox < 147.0,Firefox ESR < 115.32,
Firefox ESR < 140.7,
Thunderbird < 147,
Thunderbird < 140.7