AUGUST 4, 2026
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Case File

CVE-2021-32040

MEDIUM · CVSS 6.5 EPSS 1.97%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-04-12 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It affects MongoDB.

CVE
CVE-2021-32040
Severity
MEDIUM
CVSS
6.5
EPSS
1.97%
MongoDB

Original NVD 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. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16. Workaround: >= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.

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