  We report the discovery of KMT-2018-BLG-1292Lb, a super-Jovian $M_{\rm
planet} = 4.5\pm 1.3\,M_J$ planet orbiting an F or G dwarf $M_{\rm host} =
1.5\pm 0.4\,M_\odot$, which lies physically within ${\cal O}(10\,\pc)$ of the
Galactic plane. The source star is a heavily extincted $A_I\sim 5.2$ luminous
giant that has the lowest Galactic latitude, $b=-0.28^\circ$, of any planetary
microlensing event. The relatively blue blended light is almost certainly
either the host or its binary companion, with the first explanation being
substantially more likely. This blend dominates the light at $I$ band and
completely dominates at $R$ and $V$ bands. Hence, the lens system can be probed
by follow-up observations immediately, i.e., long before the lens system and
the source separate due to their relative proper motion. The system is well
characterized despite the low cadence $\Gamma=0.15$--$0.20\,{\rm hr^{-1}}$ of
observations and short viewing windows near the end of the bulge season. This
suggests that optical microlensing planet searches can be extended to the
Galactic plane at relatively modest cost.
