Vulnerability Details CVE-2026-93393
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 38.0%
CVSS Severity
CVSS v3 Score 8.1
References