A spill introduces liquid into places it may not be intended to reach. Ordinary moisture released by food is a different condition from a dish overflowing or tipping inside the oven.
What the observation means
The amount, location and whether it reached controls or electrical surroundings determine the immediate concern. Do not pour extra water into a hot cavity to rinse the spill or force a rapid cooldown. Hot surfaces and glass may react badly to sudden temperature changes, and the appliance instructions govern cleaning after it cools.
A useful next step
Stop the programme if necessary and allow safe cooling. If liquid has reached electrical parts, avoid further use and seek assessment. Record what spilled and where it travelled without removing covers. A steam-cleaning feature does not mean the whole appliance is designed to accept arbitrary quantities of water.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.