M. Coolie

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 120 Firefox ESR versions prior to 115.5.0 Thunderbird versions prior to 115.5.0 **Description** The issue is related to ownership mismanagement, leading to a use-after-free in `ReadableByteStreams`. This can be exploited by a remote attacker to execute arbitrary code. **Recommendations** For Firefox versions prior to 120, update to version 120 or later. For Firefox ESR versions prior to 115.5.0, update to version 115.5.0 or later. For Thunderbird versions prior to 115.5.0, update to version 115.5.0 or later.