MongoDB C Driver up to 1.30.7/2.2.3 Legacy GridFS API improper validation of specified index, position, or offset in input

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in MongoDB C Driver up to 1.30.7/2.2.3. This vulnerability affects unknown code of the component Legacy GridFS API. Executing a manipulation can lead to improper validation of specified index, position, or offset in input. This vulnerability is handled as CVE-2026-9100. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in MongoDB C Driver up to 1.30.7/2.2.3. This vulnerability affects an unknown part of the component Legacy GridFS API. The manipulation with an unknown input leads to a improper validation of specified index, position, or offset in input vulnerability. The CWE definition for the vulnerability is CWE-1285. The product receives input that is expected to specify an index, position, or offset into an indexable resource such as a buffer or file, but it does not validate or incorrectly validates that the specified index/position/offset has the required properties. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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).

The advisory is available at jira.mongodb.org. This vulnerability was named CVE-2026-9100 since 05/20/2026. The exploitation appears to be difficult. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 316388 (Linux Distros Unpatched Vulnerability : CVE-2026-9100), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.30.8 or 2.2.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316388) and CERT Bund (WID-SEC-2026-1621). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source MongoDB

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (mongodb): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of specified index, position, or offset in input
CWE: CWE-1285
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 316388
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-9100

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: C Driver 1.30.8/2.2.4

Timelineinfo

05/20/2026 Advisory disclosed
05/20/2026 +0 days CVE reserved
05/20/2026 +0 days VulDB entry created
07/23/2026 +64 days VulDB entry last update

Sourcesinfo

Advisory: jira.mongodb.org
Status: Confirmed

CVE: CVE-2026-9100 (🔒)
GCVE (CVE): GCVE-0-2026-9100
GCVE (VulDB): GCVE-100-364906
CERT Bund: WID-SEC-2026-1621 - MongoDB (C Driver): Schwachstelle ermöglicht Denial of Service und Offenlegung von Informationen

Entryinfo

Created: 05/20/2026 18:50
Updated: 07/23/2026 18:45
Changes: 05/20/2026 18:50 (76), 05/22/2026 03:25 (7), 05/24/2026 14:44 (2), 07/23/2026 18:45 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!