CVE-2023-6865

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 115.6 Firefox versions prior to 121

Description The issue is related to the EncryptingOutputStream being susceptible to exposing uninitialized data. This could be abused to write data to a local disk, potentially affecting private browsing mode. The vulnerability may allow a remote attacker to disclose protected information.

Recommendations For Firefox ESR versions prior to 115.6, update to version 115.6 or later. For Firefox versions prior to 121, update to version 121 or later. As a temporary workaround, consider restricting access to sensitive data when using private browsing mode until the issue is resolved.