CVE-2026-1850

An authorized user may disable the MongoDB server by issuing a certain type of complex query due to boolean expression simplification

State: Published
Severity: 7.1 High
Published: Feb 10, 2026
Updated: Feb 10, 2026
Reserved: Feb 3, 2026

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Description

Complex queries can cause excessive memory usage in MongoDB Query Planner resulting in an Out-Of-Memory Crash.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	mongodb
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	mongodb

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
MongoDB ServerMongoDB Inc	8.0 to before 8.0.18Affected 8.2 to before 8.2.4Affected

References

https://jira.mongodb.org/browse/SERVER-114126

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