JPX Fragment List (flst) box vulnerability in Kakadu 7.9 allows an attacker to exfiltrate local and remote files reachable by a server if the server allows the attacker to upload a specially-crafted the image that is displayed back to the attacker.
https://github.com/google/security-research/security/advisories/GHSA-g6qc-fhcq-vhf9