MongoDB C Driver up to 1.30.8/2.5.1 TLS Certificate Revocation Checking double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.91+

Summaryinfo

A vulnerability, which was classified as critical, was found in MongoDB C Driver up to 1.30.8/2.5.1. This vulnerability affects unknown code of the component TLS Certificate Revocation Checking. Such manipulation leads to double free. This vulnerability is documented as CVE-2026-84964. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in MongoDB C Driver up to 1.30.8/2.5.1. It has been rated as critical. Affected by this issue is some unknown functionality of the component TLS Certificate Revocation Checking. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at jira.mongodb.org. This vulnerability is handled as CVE-2026-84964 since 09/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.30.9 or 2.5.2 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (mongodb): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: C Driver 1.30.9/2.5.2

Timelineinfo

09/02/2026 CVE reserved
09/03/2026 +1 days Advisory disclosed
09/03/2026 +0 days VulDB entry created
09/03/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: jira.mongodb.org
Status: Confirmed

CVE: CVE-2026-84964 (🔒)
GCVE (CVE): GCVE-0-2026-84964
GCVE (VulDB): GCVE-100-398456

Entryinfo

Created: 09/03/2026 17:38
Changes: 09/03/2026 17:38 (76)
Complete: 🔍
Cache ID: 216::103

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