CVE-2026-81490— MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service
Quick assessment
Affected
MongoDB BI Connector
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是美国MongoDB公司的一个连接商业智能工具与数据库的桥梁。 MongoDB BI Connector 2.14.31之前版本存在异常处理不当漏洞，该漏洞源于数据库用户可在被采样的命名空间中创建求值可靠失败的视图，导致模式采样例程停止工作，进而造成SQL客户端无法获取结果。
Possible ATT&CK Techniques 2 AI
T1498 · Network Denial of Service T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MongoDB | BI Connector | < 2.14.31 |
affected |
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I. Basic Information for CVE-2026-81490
Vulnerability Information
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Vulnerability Title
MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service
Source: CVE Program / CVE List V5
Vulnerability Description
A database user able to create a view in a namespace that MongoDB Connector for BI samples can cause the schema-sampling routine to stop functioning by defining a view whose evaluation reliably fails. The sampling logic classifies the resulting server message as transient and, after the configured retries are exhausted, proceeds without a valid result, ending the schema refresh routine. The mongosqld process continues running without a usable schema, so SQL clients are unable to obtain results until an operator removes the view or excludes its namespace from sampling.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB BI Connector 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB BI Connector是美国MongoDB公司的一个连接商业智能工具与数据库的桥梁。 MongoDB BI Connector 2.14.31之前版本存在异常处理不当漏洞，该漏洞源于数据库用户可在被采样的命名空间中创建求值可靠失败的视图，导致模式采样例程停止工作，进而造成SQL客户端无法获取结果。
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 | 0 ~ 2.14.31 | - |
|
II. Public POCs for CVE-2026-81490
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · MongoDB · 2026-08-28 · 11 CVEs total
| CVE-2026-81532 | 8.8 HIGH | BI Connector ODBC Driver Improper Bounds Checking on Cursor Name Leading to Memory Corrupt |
| CVE-2026-77586 | 8.0 HIGH | MongoDB Connector for BI Unescaped Object Names in Generated SHOW CREATE Output |
| CVE-2026-81517 | 7.5 HIGH | MongoDB Connector for BI Improper Error Handling of Log Write Failures May Cause Loss of S |
| CVE-2026-81518 | 7.5 HIGH | BI Connector Optional Client Certificate Verification Allows Unauthenticated Connections |
| CVE-2026-81520 | 7.5 HIGH | MongoDB Connector for BI Unbounded Authentication Negotiation Leading to Connection Exhaus |
| CVE-2026-81533 | 7.1 HIGH | MongoDB BI Connector ODBC Driver Memory-Safety Issue When Parsing Oversized LIMIT Values |
| CVE-2026-76798 | 6.3 MEDIUM | MongoSQL Transition Readiness Tool Improper Output Encoding in Generated HTML Reports |
| CVE-2026-76797 | 6.3 MEDIUM | MongoSQL Transition Readiness Tool Improper Neutralization of Formula Elements in Generate |
| CVE-2026-77184 | 5.2 MEDIUM | MongoDB Connector for BI Incomplete Escaping of Stored Metadata in Generated SHOW CREATE O |
| CVE-2026-76794 | 4.6 MEDIUM | MongoDB BI Connector Transition Readiness Report Improper HTML Encoding When Processing Da |
IV. Related Vulnerabilities
Same product: BI Connector
-
CVE-2026-81520
MongoDB Connector for BI Unbounded Authentication Negotiatio -
CVE-2026-81518
BI Connector Optional Client Certificate Verification Allows -
CVE-2026-81517
MongoDB Connector for BI Improper Error Handling of Log Writ -
CVE-2026-77586
MongoDB Connector for BI Unescaped Object Names in Generated -
CVE-2026-77184
MongoDB Connector for BI Incomplete Escaping of Stored Metad
Same vendor: MongoDB
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Collection validators using collation-accepting expressions -
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CVE-2026-96299
Missing Authorization Check on Internal Aggregation Stage in -
CVE-2026-96297
MongoDB Server may disclose process memory via a crafted `$_
Same weakness: CWE-476
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kin-openapi: Incomplete Fix for GHSA-p6wj-qrr4-pgh5: Three U
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