CVE-2026-1847

MongoDB Server may crash when inserting large documents

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

Description

Inserting certain large documents into a replica set could lead to replica set secondaries not being able to fetch the oplog from the primary. This could stall replication inside the replica set leading to server 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 7.0 to before 7.0.29Affected

References

https://jira.mongodb.org/browse/SERVER-113532

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