CVE-2026-19003Hinoki check available

Code execution via oversized DSN path setting

Published Aug 12, 2026 · Updated Aug 12, 2026

Stack-based buffer overflow in MongoDB BI Connector ODBC Driver before 1.4.9 allows local users to execute code via an oversized DSN path. The Windows setup dialog calculates insufficient buffer capacity for file and folder selection fields, allowing an over-length path setting to drive an out-of-bounds write. Triggering the write requires a user to open the crafted data source and initiate file or folder selection; the outcome is a process crash or, under certain build configurations, unintended code execution in that user's context.

CVSS severity8.4
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stack-based buffer overflow in MongoDB BI Connector ODBC Driver before 1.4.9 allows local users to execute code via an oversized DSN path. The Windows setup dialog calculates insufficient buffer capacity for file and folder selection fields, allowing an over-length path setting to drive an out-of-bounds write. Triggering the write requires a user to open the crafted data source and initiate file or folder selection; the outcome is a process crash or, under certain build configurations, unintended code execution in that user's context.

The record

CVE
CVE-2026-19003
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
MongoDB
Product
MongoDB BI Connector ODBC Driver
Classifications
CWE-121, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <1.4.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

MongoDB · MongoDB BI Connector ODBC Driverversion=1.0.0 <1.4.9

Published CVSS scores

8.4MongoDB, Inc.CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8MongoDB, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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