CVE-2026-9753

Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.

State: Published
Severity: 7.2 High
Published: Jun 9, 2026
Updated: Jun 10, 2026
Reserved: May 27, 2026

Description

The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with access to the aggregate command.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N	mongodb
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H	mongodb

Weaknesses

CWE-1287 Improper validation of specified type of input

Affected Products

Product	Versions
MongoDB ServerMongoDB	8.3.0 to before 8.3.3Affected 8.2.0 to before 8.2.10Affected 8.0.0 to before 8.0.24Affected 7.0.0 to before 7.0.35Affected

References

https://jira.mongodb.org/browse/SERVER-124959

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