Is there a patch available for CVE-2026-9100?

Yes, a patch is available for CVE-2026-9100. Update the affected software to the latest version immediately.

MongoDB C Driver CVE-2026-9100

Q: What is the CVSS score of CVE-2026-9100?

CVE-2026-9100 has a CVSS 4.0 base score of 6.0 (Medium). 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

EUVD-2026-31132 MEDIUM

Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285)

2026-05-20 mongodb

GHSA-87jr-c2qj-3qrg

Buffer Overflow Suse

6.0

CVSS 4.0

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

May 20, 2026 - 17:32 vuln.today

CVSS changed

May 20, 2026 - 17:22 NVD

5.9 (MEDIUM) 6.0 (MEDIUM)

Patch available

May 20, 2026 - 17:02 EUVD

DescriptionNVD

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).

AnalysisAI

The legacy GridFS API in the MongoDB C Driver fails to validate file metadata fields retrieved from the database, enabling crafted documents stored in a GridFS collection to trigger either a division-by-zero crash (denial of service) or an out-of-bounds read that exposes process memory contents to the caller. Versions in the 1.x branch before 1.30.8 and 2.x branch before 2.2.4 are affected per EUVD-2026-31132. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-9100 vulnerability details – vuln.today

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MongoDB C Driver CVE-2026-9100

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Lifecycle Timeline

DescriptionNVD

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MongoDB C Driver CVE-2026-9100

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DescriptionNVD

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External POC / Exploit Code