<p>Energy harvesting (EH)-enabled multi-input multi-output (MIMO) short-packet communication (SPC) employs the recent advanced technologies such as radio frequency EH, SPC, and MIMO processing, targeting high energy efficiency, strong reliability, enhanced spectrum efficiency, and low latency. Moreover, nonorthogonal multiple access (NOMA) can further boost reliability and spectral efficiency by successive interference cancellation (SIC). Under SIC, information of one NOMA user is decoded by others. Thereby, the question arises when NOMA users are untrusted, which eavesdrop information of others, how their information is secured in EH-enabled MIMO SPC (EHMIMOSPC). This open problem is solved in this paper with the proposal of an analytical framework presenting the secrecy evaluation for untrusted NOMA users in EHMIMOSPC under practical conditions of nonlinear EH, imperfect SIC and imperfect channel state information. Monte-Carlo simulation validates this analytical framework and exposes understandings on the effects of key parameters on the secrecy capability of EHMIMOSPC with NOMA. Also, this paper considers EHMIMOSPC with orthogonal multiple access (OMA). The findings show that NOMA is worse than OMA in EHMIMOSPC, which is contradictory to long-packet communication.</p>