Executive brief
The MongoDB BI Connector ODBC Driver is a database connector that allows applications to access MongoDB data through standard database interfaces. A buffer overflow flaw in the setup dialog's file path handling could allow an attacker to crash the application or execute arbitrary code when a user opens the setup dialog for a malicious data source and selects a file or folder.
Technical details
The vulnerability is a classic stack or heap buffer overflow (CWE-120) caused by incorrect buffer capacity calculation in the ODBC Driver setup dialog's file and folder selection logic. The flaw is triggered when a data source definition contains an over-length file path setting, and is reachable only when a user interacts with the dialog by opening it and initiating a file or folder selection operation. An attacker can craft a malicious data source file with an oversized path value; when a user opens this in the setup dialog and attempts to browse for files/folders, the buffer overflow occurs. Depending on compile-time protections and memory layout, this can result in denial of service (crash) or arbitrary code execution in the context of the user running the dialog. MongoDB has patched this issue in version 1.4.9 by adding logic to clamp DSN path field sizes.
Affected products
- MongoDB BI Connector ODBC Driver before 1.4.9
Timeline
- 2026-08-12: disclosed: CVE published on NVD
- 2026-08-06: patched: Fixed in version 1.4.9 with logic to clamp DSN path field sizes