What’s Vulnerable › Vulnerabilities
CVE-2026-9100: Heap memory out of bounds read and crash in C Driver legacy GridFS file reader
- Severity: high (CVSS 7.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-20 · updated 2026-09-24
- Weakness: CWE-1285
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 C# Driver: from 1.10.0 before 1.30.8; from 2.0.0 before 2.2.4 — fixed in 1.30.8, 2.2.4
How to fix
Upgrade to a fixed version: MongoDB C# Driver 1.30.8, 2.2.4. Check the vendor advisory for mitigations.
References
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