CVE-2026-13077 Out-of-Bounds Heap Read in BSON CodeWScope Element Parsing via Malformed BSONColumn Data

A missing bounds check in the BSON CodeWScope element accessors allows an attacker to trigger an out-of-bounds heap read via a crafted aggregation pipeline. The vulnerability can be exploited by an authenticated user by generating a malformed BSONColumn data containing a CodeWScope element,...

CVE-2026-9740

Affected software: MongoDB Server. Vulnerability: BSON validation logic allows unauthenticated users to crash mongod via a specially crafted message. The BSON validator’s handling of certain nested binary data structures enables uncontrolled mutual recursion, where each re-entry resets internal d...