CVE-2026-96746: CWE-787: Out-of-bounds Write in MongoDB C Driver
An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.
AI Analysis
Technical Summary
This vulnerability (CWE-787) exists in the MongoDB C Driver's connection-monitoring logic. It allows an unauthenticated attacker with control over name resolution and host responses specified in the client's connection string to perform an out-of-bounds write beyond the end of a heap buffer. This memory corruption can lead to unexpected termination of the application using the driver. The issue affects versions >=0 and <1.30.12, and >=2.0.0 and <2.5.5 of the MongoDB C Driver. The CVSS 4.0 base score is 8.3, indicating high severity.
Potential Impact
Exploitation of this vulnerability can cause the application using the MongoDB C Driver to terminate unexpectedly due to heap corruption. The attacker does not require authentication but must control DNS resolution and responses for hosts in the connection string. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor MongoDB's official advisories for updates and apply patches once available.
CVE-2026-96746: CWE-787: Out-of-bounds Write in MongoDB C Driver
Description
An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.
CVSS v4.0
Score 8.3high
Affected software
MongoDB
C Driver
pkg:github/mongodb/mongo-c-driverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-787) exists in the MongoDB C Driver's connection-monitoring logic. It allows an unauthenticated attacker with control over name resolution and host responses specified in the client's connection string to perform an out-of-bounds write beyond the end of a heap buffer. This memory corruption can lead to unexpected termination of the application using the driver. The issue affects versions >=0 and <1.30.12, and >=2.0.0 and <2.5.5 of the MongoDB C Driver. The CVSS 4.0 base score is 8.3, indicating high severity.
Potential Impact
Exploitation of this vulnerability can cause the application using the MongoDB C Driver to terminate unexpectedly due to heap corruption. The attacker does not require authentication but must control DNS resolution and responses for hosts in the connection string. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor MongoDB's official advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-09-23T15:45:49.685Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab549d5f7a7c54106846f20
Added to database: 09/24/2026, 16:03:33 UTC
Last enriched: 09/24/2026, 16:17:56 UTC
Last updated: 09/25/2026, 01:55:59 UTC
Views: 8
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