CVE-2026-81490 HIGH

CVE-2026-81490: MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service

Vendor Mongodb
Product BI Connector
Weakness CWE-476
Published August 28, 2026
Last update August 28, 2026

CVSS base score

8.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 28, 2026 CVE published