Memory Management Issue in MongoDB Server's Query Execution Engine
CVE-2026-18711

7.1HIGH

Key Information:

Vendor

Mongodb
Status
Mongodb Server
Vendor
CVE Published:
11 August 2026

What is CVE-2026-18711?

A flaw exists in MongoDB Server's query execution engine that allows an authenticated user with appropriate permissions to exploit the handling of memory during certain queries on time-series collections. This vulnerability could lead to a situation where the server crashes or potentially exposes freed memory contents in the results of queries, creating significant risks for data integrity and security.

Affected Version(s)

MongoDB Server 8.3.0 < 8.3.8

MongoDB Server 8.0 < 8.0.29

References

https://jira.mongodb.org/browse/SERVER-130247

CVSS V4

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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