SB2026092275 - Heap-based buffer overflow in MongoDB driver for C

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Main Vulnerability Database SB2026092275

SB2026092275 - Heap-based buffer overflow in MongoDB driver for C

Published: September 22, 2026

Security Bulletin ID SB2026092275
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Heap-based buffer overflow (CVE-ID: CVE-2026-93393)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in the TLS transport layer of the MongoDB C Driver when processing incoming encrypted traffic through the Windows platform TLS backend. A remote attacker can send an oversized decrypted TLS record sequence to write attacker-supplied data outside a heap allocation and execute arbitrary code.

Only builds using the Windows platform TLS backend are affected.


Remediation

Install update from vendor's website.

References