Metadata name collision on $-prefixed fields causes post-auth server crash
CVE-2026-9750

7.1HIGH

Key Information:

Vendor

Mongodb
Status
Mongodb Server
Vendor
CVE Published:
9 June 2026

What is CVE-2026-9750?

An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.

Affected Version(s)

MongoDB Server 8.3.0 < 8.3.3

MongoDB Server 8.2.0 < 8.2.10

MongoDB Server 8.0.0 < 8.0.24

References

https://jira.mongodb.org/browse/SERVER-123633

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.