CVE-2026-82057 MongoDB CVE debrief

Who should care

Defenders and administrators of MongoDB instances, especially those with authenticated users having readWrite privileges, should assess exposure and verify configurations to prevent exploitation.

Why it matters

CVE-2026-82057 is a high-severity vulnerability in MongoDB that allows authenticated users to crash the mongod server process. Defenders should prioritize verifying and updating configurations, monitoring for unusual activities, and restricting privileges to necessary users.

• Server crashes leading to denial of service
• Potential for data loss or corruption due to misconfigured collections
• Need for manual operator intervention to remediate crafted collection configurations
• Requirement for verifying and updating MongoDB configurations to prevent exploitation

Technical summary

The vulnerability is caused by a type confusion in the storage engine layer when a custom WiredTiger storage configuration option with an incompatible value is specified during collection creation. This leads to corrupted memory interpretation and a server crash when documents are read from the misconfigured collection. The crafted collection configuration persists across restarts, requiring manual operator intervention to remediate. The vulnerability allows an authenticated user with readWrite privileges to crash the mongod server process.

Defensive priority

Defenders should prioritize verifying and updating MongoDB configurations, especially for authenticated users with readWrite privileges, and monitor for unusual collection creation activities.

Recommended defensive actions

• Verify and update MongoDB configurations to prevent exploitation
• Monitor for unusual collection creation activities
• Restrict readWrite privileges to necessary users
• Implement additional logging and monitoring for mongod server process
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. A vendor advisory is available on Jira. Defenders should verify and update MongoDB configurations, especially for authenticated users with readWrite privileges, and monitor for unusual collection creation activities. The vulnerability allows an authenticated user with readWrite privileges to crash the mongod server process by specifying a custom WiredTiger storage configuration option with an incompatible  

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.