CVE-2026-18888: MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving large floating point values as character data
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-18888?
CVE-2026-18888 has a severity rating of medium with a score of 6.5.
How do I fix CVE-2026-18888?
To fix CVE-2026-18888, update the MongoDB BI Connector ODBC driver to the latest version available.
What type of vulnerability is CVE-2026-18888?
CVE-2026-18888 is a buffer overflow vulnerability affecting the MongoDB BI Connector ODBC driver.
What can be impacted by CVE-2026-18888?
CVE-2026-18888 can lead to memory corruption when large floating point values are improperly converted to text.
Which software is affected by CVE-2026-18888?
CVE-2026-18888 affects the MongoDB BI Connector ODBC driver.