CVE-2026-9740 [HIGH] – A vulnerability in MongoDB Server’s BSON validation logic allows an unauthenticated user t

A vulnerability in MongoDB Server’s BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator’s handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.