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

DLA 2177-1: git security update

Package : git
Version : 1:2.1.4-2.1+deb8u9
CVE ID : CVE-2020-5260

Felix Wilhelm of Google Project Zero discovered a flaw in git, a fast,
scalable, distributed revision control system. With a crafted URL that
contains a newline, the credential helper machinery can be fooled to
return credential information for a wrong host.

For Debian 8 "Jessie", this problem has been fixed in version
1:2.1.4-2.1+deb8u9.

We recommend that you upgrade your git 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