What’s Vulnerable › Vulnerabilities
CVE-2026-18888: MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving large floating point values as character data
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-12 · updated 2026-10-23
- Weakness: CWE-787
Description
The MongoDB BI Connector ODBC Driver converts floating point column values into text without checking that the result fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the end of that buffer and corrupt adjacent memory. A user who can store data in a collection read through the BI Connector could use this to crash the application performing the read.
Affected products
- MongoDB BI Connector ODBC Driver: from 1.0.0 before 1.4.9 — fixed in 1.4.9
How to fix
Upgrade to a fixed version: MongoDB BI Connector ODBC Driver 1.4.9. Check the vendor advisory for mitigations.
References
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