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CVE-2026-9100

Heap memory out of bounds read and crash in C Driver legacy GridFS file reader

Published: May 20, 2026Updated: May 20, 2026 Sources: CVE List NVD
NVD MITRE
5.9CVSS
MEDIUM

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).

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:LI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High

Weaknesses

CWE-1285

Affected Products

C Driver
MongoDB, Inc.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://jira.mongodb.org/browse/CDRIVER-6281
jira.mongodb.org

Timeline

Published
May 20, 2026
Last Updated
May 20, 2026

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