Quick answers
- Is CVE-2026-18888 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18888 being exploited in the wild.
- How severe is CVE-2026-18888?
- Medium severity, with a CVSS score of 6.5, published 12 August 2026.
- Which products and versions are affected?
- MongoDB Bi Connector Odbc Driver before 1.4.9.
- Is there a fix for CVE-2026-18888?
- A patch was published on 2026-08-06: Version 1.4.9 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-18888 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-18888?
- Check whether you run MongoDB Bi Connector Odbc Driver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a classic buffer overflow in the ODBC driver's floating-point to text conversion logic. The driver converts floating point values without bounds-checking, allowing large values to overflow the destination buffer and corrupt adjacent memory. The attack requires the ability to store malicious data in a MongoDB collection that is then queried through the BI Connector; network-based remote exploitation is not direct, but depends on application context. An attacker with write access to MongoDB can reliably crash consuming applications, leading to denial of service. A patch was released in version 1.4.9 that clamps large floats during string conversion.
Affected products
- MongoDB BI Connector ODBC Driver before 1.4.9
Timeline
- 2026-08-12: disclosed
- 2026-08-06: patched: Version 1.4.9 released