CVE-2026-84964

A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://jira.mongodb.org/browse/CDRIVER-6409	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mongodb:c_driver::::::mongodb::*
	cpe:2.3:a:mongodb:c_driver::::::mongodb::*

History

22 Sep 2026, 16:19

Type	Values Removed	Values Added
First Time		Mongodb c Driver Mongodb
CPE		cpe:2.3:a:mongodb:c_driver::::::mongodb::*
References	~~() https://jira.mongodb.org/browse/CDRIVER-6409 -~~	() https://jira.mongodb.org/browse/CDRIVER-6409 - Vendor Advisory

Information

Published : 2026-09-03 16:18

Updated : 2026-09-22 16:19

NVD link : CVE-2026-84964

Mitre link : CVE-2026-84964

CVE.ORG link : CVE-2026-84964

JSON object : View

Products Affected

mongodb

c_driver

CWE

CWE-415

Double Free

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