Researchers demonstrated 'Ghostcommit,' a technique that hides prompt injection instructions inside a PNG image committed to a repository. AI code review tools like CodeRabbit and Bugbot don't inspect image contents, but a downstream coding agent that does process the image can be tricked into reading a repo's .env file and exfiltrating secrets by encoding them as numeric data in code. This shows a real, demonstrated cross-modal injection vector with tangible secret-theft impact, not a theoretical concern.
Updated Jul 12, 2026