CVE-2026-76794 MongoDB CVE debrief

Who should care

Defenders responsible for MongoDB and MongoSQL Transition Readiness Tool deployments should assess exposure and prioritize verification and updates to prevent potential script code execution. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review and update the tool to prevent exposure.

Why it matters

Defenders should prioritize verifying and updating the MongoSQL Transition Readiness Tool to prevent potential script code execution and exposure of report contents or alteration of its display.

• Potential script code execution when generating and opening reports
• Exposing report contents or altering its display

Technical summary

The MongoSQL Transition Readiness Tool does not sufficiently encode database metadata before including it in generated HTML, allowing a MongoDB user with write access to introduce crafted metadata that may cause script code to run when another user generates and opens the report. This issue affects MongoDB users with write access who can introduce crafted metadata, and users who generate and open reports. The vulnerability allows for potential script code execution and exposure of report contents or alteration of its display.

Defensive priority

Defenders should prioritize verifying and updating the MongoSQL Transition Readiness Tool to prevent potential script code execution.

Recommended defensive actions

• Verify and update the MongoSQL Transition Readiness Tool to the latest version
• Restrict write access to MongoDB users who can introduce crafted metadata
• Monitor report generation and opening for potential script code execution
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, but do not specify versions or remediation steps. The MongoSQL Transition Readiness Tool's insufficient encoding of database metadata allows for potential script code execution. Defenders should verify and update the tool to prevent exposure. Evidence is limited to CVE and NVD details, with no additional source information available.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.