Oracle Database 26ai is now availble. If you haven't you downloaded already: Why?
Purpose
Undocumented but appears to be used for importing and/or purging user password history and for importing the password verify function associated with a named profile.
AUTHID
DEFINER
Dependencies
DBMS_ASSERT
DBMS_STANDARD
USER$
DBMS_PDB
KUPP$PROC
USER_HISTORY$
DBMS_SQL
Data Types
TYPE arrayOfHistoryRecords ....
Documented
No
First Available
Not Known
Security Model
Owned by SYS with EXECUTE granted to the EXP_FULL_DATABASE and IMP_FULL_DATABASE roles.
Direct access to this package is prevented by an Accessible By clause.