CVE-2026-106433

Improper state management in MongoDB libmongocrypt can cause provider-specific data to be treated as an incompatible type when cleaning up a key document containing duplicate masterKey fields. An authenticated actor who can modify key vault documents, or a server that returns such a key document, can cause invalid memory access and invalid frees in the client process. This can terminate the application or corrupt process memory.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://jira.mongodb.org/browse/MONGOCRYPT-964	Vendor Advisory Issue Tracking

Configurations

Configuration 1 (hide)

cpe:2.3:a:mongodb:libmongocrypt:*:*:*:*:*:*:*:*

History

27 Oct 2026, 20:17

Type	Values Removed	Values Added
CPE		cpe:2.3:a:mongodb:libmongocrypt::::::::
First Time		Mongodb libmongocrypt Mongodb
References	~~() https://jira.mongodb.org/browse/MONGOCRYPT-964 -~~	() https://jira.mongodb.org/browse/MONGOCRYPT-964 - Vendor Advisory, Issue Tracking

08 Oct 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-08 19:16

Updated : 2026-10-27 20:17

NVD link : CVE-2026-106433

Mitre link : CVE-2026-106433

CVE.ORG link : CVE-2026-106433

JSON object : View

Products Affected

mongodb

libmongocrypt

CWE

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

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