CVE-2026-18709

MEDIUM CVSS 4.0: 5.9 EPSS 0.14%
Updated Aug 12, 2026
MongoDB
Parameter Value
CVSS 5.9 (MEDIUM)
Type CWE-862 (Missing Authorization)
Vendor MongoDB
Public PoC No

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.

Attack Parameters

Attack Vector
Adjacent
Requires local network access
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0