  Soft X-ray transients are a subclass of the low mass X-ray binaries that
occasionally show a sudden rise in their soft X-ray luminosity; otherwise, they
remain in an extremely faint state. We investigate the accretion properties of
the soft X-ray transient XTE J1856+053 during its 2023 outburst obtained by
NICER and NuSTAR data in July. We present detailed results on the timing and
spectral analysis of the X-ray emission during the outburst. The power spectral
density shows no quasi-periodic oscillation features. The source's spectrum on
July 19 can be well-fitted with a multi-color blackbody component, a power-law
component, and a reflection component with a broadened iron emission line.
NICER spectra can be well-fitted by considering a combination of a blackbody
and a power-law. The source exhibits a transition within just five days from a
soft state to an intermediate state during the outburst decline phase. The
inner accretion disk has a low inclination angle ($\sim18^\circ$). The spectral
analysis also suggests a high-spin ($a>0.9$) BH as the central accreting
object.
