Does the explosion of TNT include oxidation?
3 nitrogroups of TNT are rich of oxygen, but the aromatic ring has only carbon and hydrogen atoms.

Therefore oxygen of nitrogroups oxidizes carbon and hydrogen atoms.

There is no principle difference between oxidation and reduction agens being separate molecules, or being different parts of the same molecule.

Note that TNT, in contrary to e.g nitroglycerine, is oxygen deficient, so the amount of available oxygen is not enough for complete oxidation to water and carbon dioxide.

TNT:

$$\ce{2 C7H5N3O6 -&gt; 3 N2 + 5 H2O + 7 CO + 7 C}$$
or
$$\ce{2 C7H5N3O6 -&gt; 3 N2 + 5 H2 + 12 CO + 2 C}$$

Nitroglycerine

$$\ce{4 C3H5N3O9 -&gt; 6 N2 + 10 H2O + 12 CO2 +  O2 }$$