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CVE-2026-18888— MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving large floating point values as character data

Quick assessment

Affected
MongoDB BI Connector ODBC Driver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MongoDB BI Connector ODBC Driver是美国MongoDB公司的一款数据库连接驱动软件。 MongoDB BI Connector ODBC Driver 1.4.9之前版本存在缓冲区错误漏洞，该漏洞源于将浮点列值转换为文本时未检查结果是否适合目标缓冲区，可能导致应用程序崩溃。

CVSS 6.5 · Medium EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
MongoDB BI Connector ODBC Driver 1.0.0< 1.4.9 affected
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I. Basic Information for CVE-2026-18888

Vulnerability Information
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Vulnerability Title
MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving large floating point values as character data
Source: CVE Program / CVE List V5
Vulnerability Description
The MongoDB BI Connector ODBC Driver converts floating point column values into text without checking that the result fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the end of that buffer and corrupt adjacent memory. A user who can store data in a collection read through the BI Connector could use this to crash the application performing the read.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB BI Connector ODBC Driver 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB BI Connector ODBC Driver是美国MongoDB公司的一款数据库连接驱动软件。 MongoDB BI Connector ODBC Driver 1.4.9之前版本存在缓冲区错误漏洞，该漏洞源于将浮点列值转换为文本时未检查结果是否适合目标缓冲区，可能导致应用程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB BI Connector ODBC Driver 1.0.0 ~ 1.4.9 -

II. Public POCs for CVE-2026-18888

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III. Intelligence Information for CVE-2026-18888

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Vendor Pages for CVE-2026-18888 (1)

Same Patch Batch · MongoDB · 2026-08-12 · 7 CVEs total

CVE-2026-19001 9.8 CRITICAL MongoDB BI Connector ODBC driver may write outside an allocated buffer when handling overs
CVE-2026-19002 8.1 HIGH Crafted database metadata may cause memory corruption in MongoDB BI Connector ODBC Driver
CVE-2026-19004 8.1 HIGH MongoDB BI Connector ODBC Driver Memory-Safety Issue When Handling Stored Procedure Output
CVE-2026-19003 7.8 HIGH MongoDB BI Connector ODBC driver may write outside an allocated buffer when the setup dial
CVE-2026-19502 5.5 MEDIUM Insufficient redaction of sensitive configuration values in diagnostic output of MongoDB S
CVE-2026-19503 4.8 MEDIUM Insufficient OIDC endpoint validation could invoke unintended local protocol handlers

IV. Related Vulnerabilities

Same product: BI Connector ODBC Driver
Same vendor: MongoDB
Same weakness: CWE-787

V. Comments for CVE-2026-18888

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