CVE-2026-6756 is a mitigation bypass vulnerability in Firefox for Android that was fixed in Firefox 150. The vulnerability has a CVSS 3.1 base score of 7.5 (high severity) with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N, indicating it is remotely exploitable without privileges or user interaction and impacts integrity but not confidentiality or availability. The issue is categorized under CWE-200 (Information Exposure). Mozilla's official advisory confirms the fix in Firefox 150. No known exploits in the wild have been reported.

The vulnerability allows an attacker to bypass mitigation mechanisms in Firefox for Android, potentially leading to unauthorized modification or manipulation of data (integrity impact). There is no direct impact on confidentiality or availability according to the CVSS vector. Exploitation could allow an attacker to compromise the integrity of the browser environment on affected devices. No known active exploitation has been reported.

Mozilla has released an official fix for this vulnerability in Firefox 150. Users and administrators should update Firefox for Android to version 150 or later to remediate this issue. Since this is not a cloud service, remediation depends on applying the update. There are no indications that additional mitigations or workarounds are required beyond applying the official update.