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

> CVE-2026-81490: MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service. CVSS 7.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-81490
Last updated: 2026-09-29T19:15:04Z

- Published: 2026-08-28 20:10 UTC · Updated: 2026-09-29 19:15 UTC · Assigner: mongodb
- CVSS: 7.7 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- EPSS: 0.47%, 41th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-476

## 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.

## Affected vendors and products

- MongoDB: BI Connector

## Tracked companies

- [MongoDB Atlas](https://rewindex.com/company/mongodb-atlas.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-81490)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-81490)
- [https://www.mongodb.com/docs/bi-connector/current/release-notes/](https://www.mongodb.com/docs/bi-connector/current/release-notes/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-81490 · Markdown: https://rewindex.com/cve/CVE-2026-81490.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-81490 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:47.508Z