CVE-2026-76797

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Formula Injection in MongoSQL Transition Readiness Tool CSV Reports

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: MongoDB, Inc.

Description

The MongoSQL Transition Readiness Tool writes database and collection names into its generated CSV reports without neutralizing leading characters that spreadsheet applications treat as formulas. A user with write privileges on the cluster can choose a namespace name that is later evaluated as a formula when an operator opens the generated report in a spreadsheet application, which may result in unintended disclosure of report contents or execution of external content on the operator's workstation. Generating a report for the affected namespace and opening it in a spreadsheet application is required.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-28

Last Modified

2026-08-28

Generated

2026-08-29

AI Q&A

2026-08-29

EPSS Evaluated

N/A

NVD

CVE-2026-76797

EUVD

EUVD-2026-67777

Affected Vendors & Products

Vendor	Product	Version / Range
mongodb	mongo_sql_transition_readiness_tool	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1236	The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product.

Attack-Flow Graph

Executive Summary

The MongoSQL Transition Readiness Tool generates CSV reports containing database and collection names. If a namespace name starts with characters that spreadsheet applications interpret as formulas, an attacker with write privileges could craft a name that executes unintended actions when the report is opened in a spreadsheet. This may lead to disclosure of report contents or execution of external content on the operator's workstation.

Detection Guidance

Check for CSV reports generated by the MongoSQL Transition Readiness Tool. Inspect report contents for namespace names starting with special characters like =, +, -, or @ that spreadsheet applications may interpret as formulas.

Impact Analysis

If you use the MongoSQL Transition Readiness Tool to generate reports and open them in spreadsheet software, an attacker with write access to your MongoDB cluster could exploit this to access sensitive data or run malicious code on your system. This requires the attacker to have prior write privileges.

Compliance Impact

This vulnerability could lead to unauthorized data disclosure, potentially violating GDPR's data protection requirements or HIPAA's confidentiality rules if sensitive data is exposed. Organizations using this tool must ensure proper access controls and review report contents before opening in spreadsheets.

Mitigation Strategies

Avoid opening CSV reports from untrusted sources. Review and sanitize namespace names to exclude leading characters that spreadsheets treat as formulas. Restrict write privileges on the cluster to trusted users only.

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