CVE-2026-82074 MongoDB CVE debrief

Who should care

Defenders responsible for MongoDB Server instances, especially those with authenticated users having minimal privileges, should assess exposure and prioritize patching to prevent unauthorized read access to collection data.

Why it matters

CVE-2026-82074 is a high-severity vulnerability in MongoDB Server that allows an authenticated user with minimal privileges to gain unauthorized read access to collection data. Defenders should prioritize verifying and patching affected instances to prevent data breaches and disruption of database operations.

• Potential unauthorized read access to sensitive collection data.
• Increased risk of data breaches due to exploitation of the vulnerability.
• Need for verification of MongoDB Server instances and user privileges.
• Potential disruption of database operations due to patching and remediation efforts.

Technical summary

The MongoDB Server contains an incorrect authorization vulnerability in the aggregation framework. An authenticated user with minimal privileges can craft a specially formatted aggregation request that causes the server's authorization subsystem to evaluate a different operation than what is actually executed, resulting in unauthorized read access to collection data within the target database. This vulnerability has a high severity with a CVSS score of 7.1 and can lead to potential unauthorized read access to sensitive collection data, increased risk of data breaches, and disruption of database operations.

Defensive priority

Defenders should prioritize verifying and patching MongoDB Server instances, especially those with authenticated users having minimal privileges, to prevent unauthorized read access to collection data.

Recommended defensive actions

• Verify and apply the latest patches for MongoDB Server, especially for versions 7.0.0 to 7.0.41 and 8.0.0 to 8.0.30.
• Restrict aggregation framework access to minimize the attack surface.
• Monitor database activity for suspicious aggregation requests.
• Implement additional access controls and authentication mechanisms for database users.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• 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 detail page provide information on the incorrect authorization vulnerability in the aggregation framework of MongoDB Server. An authenticated user with minimal privileges can craft a specially formatted aggregation request to gain unauthorized read access to collection data within the target database.

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.