CVE-2026-76797: MongoDB Mongosql Transition Readiness Tool

Medium severity, CVSS 6.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• MongoDB Mongosql Transition Readiness Tool: before 1.1.3 (fixed in 1.1.3)

Published 2026-08-28. Last modified 2026-09-17.