https://geodatamaster.com/2026/05/14/oracle-database-multitenant-security-isolation-enhancement-with-directory_prefixes_allowed-parameter/Geodata Master en2026-05-14T09:57:22+00:00Oracle Database Multitenant Security Isolation Enhancement With DIRECTORY_PREFIXES_ALLOWED ParameterDIRECTORY_PREFIXES_ALLOWED, oracle 19.30 new features, oracle database parameter DIRECTORY_PREFIXES_ALLOWED, oracle multitenant security, oracle PDB security isolation, oracle database directory security, Oracle PDB isolation, oracle database security protection, oracle CDB security directory, oracle database directory creation security, oracle database file system exposure