May 12, 2026
CTFusion uses live CTF events to counter contamination and cheating in cyber agent benchmarks
Lee, Bae and Yun show that existing CTF benchmarks can be solved by retrieving published writeups when agents have web search, and propose CTFusion, which evaluates agents on live CTF competitions through an MCP server on the CTFd platform. They test 3 LLMs and 2 agent designs across 5 live CTF events.