If a vulnerability is found in one Kaspa ZK precompile, does it affect the whole network?

No — each ZK proof precompile in Kaspa operates independently, so a flaw in one does not automatically compromise the others or Kaspa's base layer. A precompile is a specialized built-in operation, in this case one that verifies a specific type of zero-knowledge proof; each is identified by its own tag. Because they are isolated from one another, a vulnerability discovered in, say, a Groth16 precompile would not expose transactions that use a RISC Zero precompile, and the fundamental security of Kaspa's core protocol would remain intact. This matters for anyone building on Kaspa's ZK features: you can choose which proof system to trust, and a problem with one option does not cascade across the entire ecosystem.