CVE-2026-9753 HIGH

CVE-2026-9753: Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.

Vendor Mongodb
Product MongoDB Server
Weakness CWE-1287
Published June 9, 2026
Last update June 10, 2026

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 9, 2026 CVE published
June 10, 2026 Record updated