GHSA-G8CF-RCJF-C8CF kin-openapi: Uncontrolled Recursion on Circular allOf/anyOf/oneOf Schemas Causes Fatal Process Crash

Summary kin-openapi's spec loader and spec-time validator both handle circular schema references safely: the loader resolves circular $refs on purpose to support recursive data structures, and Schema.validate uses stack-based cycle detection. Validate therefore accepts a schema whose allOf / anyO...