Denial of Service Vulnerability in MongoDB Server Affecting Time-Series Collections
CVE-2026-18695

7.1HIGH

Key Information:

Vendor

Mongodb
Status
Mongodb Server
Vendor
CVE Published:
11 August 2026

What is CVE-2026-18695?

A flaw in MongoDB Server affects the processing of specific query predicates on time-series collections that contain a metaField. An authenticated user with write permissions could exploit this issue, leading to an unexpected termination of the server process. This situation results in a denial of service, potentially impacting the availability and performance of the affected MongoDB instance.

Affected Version(s)

MongoDB Server 8.3.0 < 8.3.8

MongoDB Server 8.0 < 8.0.29

MongoDB Server 7.0 < 7.0.40

References

https://jira.mongodb.org/browse/SERVER-129460

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

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