CVE-2026-9100 MEDIUM

CVE-2026-9100: Heap memory out of bounds read and crash in C Driver legacy GridFS file reader

Vendor Mongodb, Inc.
Product C Driver
Weakness CWE-1285
Published May 20, 2026
Last update May 20, 2026
View on NVD All CVEs

CVSS base score

6.0/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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).

Key dates

02Disclosure timeline

May 20, 2026 CVE published
May 20, 2026 Record updated