A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Mongodb |
|
Configuration 1 [-]
|
No data.
References
| Link | Providers |
|---|---|
| https://jira.mongodb.org/browse/CDRIVER-6417 |
|
History
Tue, 29 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:* |
Fri, 18 Sep 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to, or an attacker able to impersonate or redirect the client's connection, can cause the driver to write attacker-supplied data outside the bounds of a heap allocation while processing incoming encrypted traffic. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Successful exploitation may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process. | A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process. |
| Metrics |
ssvc
|
Fri, 18 Sep 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mongodb
Mongodb c Driver |
|
| Vendors & Products |
Mongodb
Mongodb c Driver |
Thu, 17 Sep 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to, or an attacker able to impersonate or redirect the client's connection, can cause the driver to write attacker-supplied data outside the bounds of a heap allocation while processing incoming encrypted traffic. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Successful exploitation may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process. | |
| Title | Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream | |
| Weaknesses | CWE-787 | |
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: mongodb
Published: 2026-09-17T20:26:38.911Z
Updated: 2026-09-18T17:35:11.797Z
Reserved: 2026-09-17T20:10:59.785Z
Link: CVE-2026-93393
Vulnrichment
Updated: 2026-09-18T17:33:29.998Z
NVD
Status : Analyzed
Published: 2026-09-17T21:17:56.163
Modified: 2026-09-29T19:17:54.137
Link: CVE-2026-93393
Redhat
No data.