Part 2 of the study provides cohort expansion to further explore the safety, pharmacology, and clinical activity of CBL0137 monotherapy in subjects with specific previously treated hematological cancers, including DLBCL, FL, MCL, HL, chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), and multiple myeloma (MM).