Is CVE-2026-18888 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18888?

CVE-2026-18888 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-18888

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.