Researchers have built a pull request that steals a repository's secrets by hiding the malicious instruction inside a PNG that AI code reviewers never open. The reviewer waves the change through. Later, a coding agent reads the picture, opens the repo's .env, and writes every key into the source as a harmless-looking list of numbers. How 'Ghostcommit' works The attack is joint work from the University of Missouri-Kansas City's ASSET Research Group, by associate professor Sudipta Chattopadhyay and researcher Murali Ediga, who shared it with BleepingComputer. The group published a proof-of-concept on GitHub this week and says it has disclosed the findings to the affected vendors. The researchers frame the attack against a review gap that's already wide: a survey of 6,480 pull requests…