FlexRIC v2.0.0 contains a denial of service vulnerability where duplicate E2_SETUP_REQUEST messages from the same or spoofed E2 Node cause application crashes. The iApp registry improperly enforces node ID uniqueness using assert() instead of graceful error handling. Remote unauthenticated attackers can exploit this by sending two E2_SETUP_REQUESTs with identical E2 node configuration to crash the iApp process on port 36421, triggering SIGABRT. This vulnerability affects the Open RAN (O-RAN) ecosystem and demonstrates poor input validation in critical network infrastructure components.