CVE-2026-18709

MediumCVSS 6.4/10Last modified Oct 23, 2026

Description

An issue in MongoDB Server could allow an authenticated user with direct network access to a shard to improperly commit or abort an in-progress prepared transaction, bypassing the intended transaction coordination process. This could result in cross-shard data inconsistency, cluster clock corruption, and violation of transaction atomicity guarantees.

Metrics

CVSS 3.1 6.4/10CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-862

Affected software

Vendor	Product	Versions
MongoDB	MongoDB Server	>= 8.3.0, < 8.3.8; >= 8.0, < 8.0.29; >= 7.0, < 7.0.40

References

https://jira.mongodb.org/browse/SERVER-130544Vendor Advisory, Issue Tracking

Timeline

Published: Aug 11, 2026
Last modified: Oct 23, 2026
NVD status: Analyzed

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