MongoDB Server Vulnerability for Authenticated Users with Network Access
CVE-2026-18709

5.9MEDIUM

Key Information:

Vendor

Mongodb
Status
Mongodb Server
Vendor
CVE Published:
11 August 2026

What is CVE-2026-18709?

A vulnerability in MongoDB Server permits authenticated users with direct network access to a shard to manipulate ongoing prepared transactions. This flaw may lead to improper commitment or abortion of transactions, resulting in cross-shard data inconsistency and potential violations of atomicity guarantees. Additionally, it may cause cluster clock corruption, disrupting the cluster's overall functionality.

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-130544

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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