# CVE-2026-9100

## Summary

- **CVE ID:** CVE-2026-9100
- **Severity:** MEDIUM
- **CVSS Score:** 6 (CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-1285
- **Published:** May 20, 2026
- **Last Modified:** May 20, 2026

## Description

The MongoDB C Driver's legacy GridFS API accepts malformed file metadata from the database without adequate validation. Crafted documents in a GridFS collection may cause any application that reads those files via the legacy API to either crash (via a division-by-zero) or silently leak process memory contents (via an out-of-bounds read).

## Affected Products

- MongoDB, Inc. — C Driver (1.0)
- MongoDB, Inc. — C Driver (2.0)

## References

- [CNA](https://jira.mongodb.org/browse/CDRIVER-6281)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 21.7

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._