A thunderbird security update has been released for Debian GNU/Linux 8 LTS

Package : thunderbird
Version : 1:68.2.2-1~deb8u1
CVE ID : CVE-2019-11755 CVE-2019-11757 CVE-2019-11759
CVE-2019-11760 CVE-2019-11761 CVE-2019-11762
CVE-2019-11763 CVE-2019-11764 CVE-2019-15903

Multiple security issues have been found in Thunderbird which could
potentially result in the execution of arbitrary code or denial of service.

Debian follows the Thunderbird upstream releases. Support for the 60.x series
has ended, so starting with this update we're now following the 68.x releases.

For Debian 8 "Jessie", these problems have been fixed in version
1:68.2.2-1~deb8u1.

We recommend that you upgrade your thunderbird packages.

Further information about Debian LTS security advisories, how to apply these
updates to your system and frequently asked questions can be found at:
https://wiki.debian.org/LTS