Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 68.8.0. Security Fix: * Mozilla: Use-after-free during worker shutdown * Mozilla: Memory safety bugs fixed in Firefox 76 and Firefox ESR 68.8 * usrsctp: Buffer overflow in AUTH chunk input validation * Mozilla: Arbitrary local file access with "Copy as cURL" * Mozilla: Sender Email Address Spoofing using encoded Unicode characters For more details about the security issue, including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.