I need to validate ITK 5.2.0 in our software as a third party library.
As we are validating ITK I will need to know what are the known issues for that particular version.
The github page for the issues just refers issues for version 5.3, 5.4 and 6.0.
Do you know where I can find issues for version 5.2.0
Take a look at the issues sorted by oldest. All the issues created before ITK 5.2.0 tagging date are implicitly known issues. If you want to be thorough, you could add to that list issues which were created before 5.2.0 tagging, but closed after that date - they do not appear in the list I linked above.