{"id":"CVE-2021-32040","state":"PUBLISHED","title":"Large aggregation pipelines with a specific stage can crash mongod under default configuration","description":"It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. 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