>The Hungarian government - who presumably has access to the EU CSAM database (or can coerce those who do), might attempt to add a fingerprint of a manipulated CSAM image that collides with the fingerprint of the satirical image.

Then what? What does that achieve? There would be a huge spike in images identified as CSAM which would obviously throw up red flags. It seems like this would mostly just be headache for the law enforcement across the EU. It isn't like France is going to arrest a huge number of people without any investigation or thought of how this one CSAM image spread so far so quickly. And if we are talking about the result in Hungary, that government doesn't need this tool to abuse its power. Why go through all that effort? They could just do the equivalent of rubber-hose cryptanalysis.