CVE-2026-18888: CWE-787: Out-of-bounds write in MongoDB BI Connector ODBC Driver
CVE-2026-18888 is a high severity vulnerability in the MongoDB BI Connector ODBC Driver where the driver improperly converts floating point column values to text without verifying buffer size. This can lead to an out-of-bounds write, causing memory corruption and potentially crashing the application reading the data. The issue affects versions 1.0.0 and all versions from 1.0.0 up to but not including 1.4.9.
AI Analysis
Technical Summary
The MongoDB BI Connector ODBC Driver has an out-of-bounds write vulnerability (CWE-787) due to converting floating point column values into text without checking if the resulting string fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the buffer boundary, corrupting adjacent memory. This can be triggered by a user who can insert data into a collection accessed via the BI Connector, potentially causing the reading application to crash.
Potential Impact
An attacker who can store data in a MongoDB collection accessed through the BI Connector ODBC Driver can cause the application performing the read to crash due to memory corruption from an out-of-bounds write. This could lead to denial of service conditions. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted floating point data through the BI Connector ODBC Driver or restrict user ability to insert large floating point values that could trigger the vulnerability.
CVE-2026-18888: CWE-787: Out-of-bounds write in MongoDB BI Connector ODBC Driver
Description
CVE-2026-18888 is a high severity vulnerability in the MongoDB BI Connector ODBC Driver where the driver improperly converts floating point column values to text without verifying buffer size. This can lead to an out-of-bounds write, causing memory corruption and potentially crashing the application reading the data. The issue affects versions 1.0.0 and all versions from 1.0.0 up to but not including 1.4.9.
CVSS v4.0
Score 7.1high
Affected software
pkg:github/BI Connector ODBC DriverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The MongoDB BI Connector ODBC Driver has an out-of-bounds write vulnerability (CWE-787) due to converting floating point column values into text without checking if the resulting string fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the buffer boundary, corrupting adjacent memory. This can be triggered by a user who can insert data into a collection accessed via the BI Connector, potentially causing the reading application to crash.
Potential Impact
An attacker who can store data in a MongoDB collection accessed through the BI Connector ODBC Driver can cause the application performing the read to crash due to memory corruption from an out-of-bounds write. This could lead to denial of service conditions. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted floating point data through the BI Connector ODBC Driver or restrict user ability to insert large floating point values that could trigger the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-08-04T19:36:22.415Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7cda88bf8831d53922d9d1
Added to database: 08/12/2026, 20:41:44 UTC
Last enriched: 08/12/2026, 20:56:30 UTC
Last updated: 08/12/2026, 21:02:42 UTC
Views: 4
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