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MEDIUM · 6.4

CVE-2026-18709

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...

Vulnerability 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.

CVSS Score

6.4

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MongodbMongodb>= 7.0.0, < 7.0.40

Related Weaknesses (CWE)

CWE-862

References

FAQ

What is CVE-2026-18709?

CVE-2026-18709 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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...

How severe is CVE-2026-18709?

CVE-2026-18709 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18709?

Check the references section above for vendor advisories and patch information. Affected products include: Mongodb Mongodb.