CVE-2026-111923 [HIGH] – Fleet before 4.89.0 contains an unbounded recursion vulnerability in Apple MDM enrollment

Fleet before 4.89.0 contains an unbounded recursion vulnerability in Apple MDM enrollment property list parsing that allows unauthenticated attackers to crash the server. Attackers can send a crafted binary plist payload of about 150 bytes to the enrollment endpoints, triggering exponential allocation or infinite recursion that exhausts CPU and memory.