CVE-2026-104004

Collection validators using collation-accepting expressions can crash MongoDB Server on insert

State: Published
Severity: 7.1 High
Published: Oct 13, 2026
Updated: Oct 15, 2026
Reserved: Oct 1, 2026

Description

MongoDB Server's collection validation feature may not properly handle certain expressions stored in a validator. In some cases, this can cause the server process to stop running when a document is later inserted. The behavior can occur for authenticated users with write access.

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-476 NULL Pointer Dereference

Affected Products

Product	Versions
MongoDB ServerMongoDB	8.3.0 to before 8.3.13Affected 8.0 to before 8.0.34Affected 9.0 to before 9.0.4Affected

References

https://jira.mongodb.org/browse/SERVER-131412

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