CVE-2026-19002 in BI Connector ODBC Driver
Summary
by MITRE • 08/13/2026
A missing bounds check when parsing stored procedure parameter metadata in the MongoDB BI Connector ODBC Driver can result in an out-of-bounds write in the client application process. Triggering this issue requires control over the server the driver connects to, or the ability to respond in its place, in order to return malformed metadata. The resulting memory corruption may cause the client application to terminate abnormally or, under certain conditions, execute unintended code.
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Analysis
by VulDB Data Team • 08/13/2026
The vulnerability described represents a critical memory safety issue within the MongoDB BI Connector ODBC Driver that stems from inadequate input validation during metadata parsing operations. This flaw manifests as a missing bounds check when processing stored procedure parameter metadata, creating an exploitable condition that can lead to out-of-bounds memory writes. The vulnerability falls under the CWE-129 category of "Improper Validation of Array Index" and aligns with ATT&CK technique T1548.001 for privilege escalation through malicious code execution. The attack vector requires an adversary to either compromise the MongoDB server the driver connects to or perform a man-in-the-middle position to inject malformed metadata responses.
The technical implementation of this vulnerability occurs during the client-side parsing of metadata structures returned by the MongoDB server. When the ODBC driver receives parameter metadata from a stored procedure definition, it fails to validate the size constraints of arrays or buffers before writing data into memory locations. This oversight allows an attacker to craft malicious metadata that exceeds expected buffer boundaries, causing memory corruption in the client application process. The flaw specifically affects applications using the MongoDB BI Connector ODBC Driver for database connectivity and reporting purposes, particularly those connecting to MongoDB instances through standard ODBC interfaces.
The operational impact of this vulnerability extends beyond simple application crashes to potentially enable remote code execution under specific conditions. When the out-of-bounds write occurs, it can corrupt adjacent memory regions including stack canaries, return addresses, or other critical program data structures. This memory corruption may result in abnormal termination of the client application, but more critically, could allow an attacker to manipulate program flow and execute arbitrary code with the privileges of the affected process. The severity is compounded by the fact that this vulnerability requires minimal attack surface control compared to other memory corruption flaws.
Mitigation strategies for this vulnerability should focus on both immediate patching and operational security measures. Organizations must apply the latest updates from MongoDB that address the bounds checking deficiencies in the ODBC driver implementation, as recommended by the vendor's security advisories. Network segmentation and access controls should be implemented to limit exposure of systems running the BI Connector to trusted networks only. Additionally, monitoring for unusual ODBC connection patterns or metadata exchange behaviors can help detect potential exploitation attempts. The vulnerability demonstrates the importance of input validation in database connectivity components and reinforces the need for comprehensive security testing of third-party database drivers against memory safety issues.