Version 17.7.0-1 of libzypp is marked for autoremoval from testing on Mon 02 Mar 2020. It is affected by #949196. The removal of libzypp will also cause the removal of (transitive) reverse dependency: zypper. You should try to prevent the removal by fixing these RC bugs.
CVE-2018-7685: The decoupled download and installation steps in libzypp before 17.5.0 could lead to a corrupted RPM being left in the cache, where a later call would not display the corrupted RPM warning and allow installation, a problem caused by malicious warnings only displayed during download.
CVE-2017-7436: In libzypp before 20170803 it was possible to retrieve unsigned packages without a warning to the user which could lead to man in the middle or malicious servers to inject malicious RPM packages into a users system.
CVE-2017-7435: In libzypp before 20170803 it was possible to add unsigned YUM repositories without warning to the user that could lead to man in the middle or malicious servers to inject malicious RPM packages into a users system.
CVE-2017-9269: In libzypp before August 2018 GPG keys attached to YUM repositories were not correctly pinned, allowing malicious repository mirrors to silently downgrade to unsigned repositories with potential malicious content.