CVE-2026-82054 MongoDB CVE debrief

Who should care

MongoDB server administrators, security teams, and developers using MongoDB in their applications should assess exposure and potential impact, focusing on deployments with concurrent request loads. They should verify MongoDB server version and implement compensating controls to limit memory consumption. Additionally, they should review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, and

Why it matters

Defenders should prioritize verifying exposure and assessing potential impact, focusing on MongoDB server deployments, especially those with concurrent request loads. The vulnerability can cause significant memory amplification, leading to potential denial of service. Verification of MongoDB server version and implementation of compensating controls are recommended.

• Denial of service due to memory exhaustion
• Potential impact on concurrent request loads
• Need for verification of MongoDB server version and exposure

Technical summary

The vulnerability exists in MongoDB server's JSON Pointer parser used during $jsonSchema query filter processing. A specially crafted $jsonSchema filter field can cause significant memory amplification, leading to potential denial of service. This issue can be triggered when a find command includes a specially crafted $jsonSchema filter field, causing the parser to process the input without enforcing adequate limits on iteration count or total allocation size. Under concurrent request load, the cumulative memory consumption can exhaust available heap memory, causing the server's out-of-memory handler to terminate the mongod process and deny service to all connected clients.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact, focusing on MongoDB server deployments, especially those with concurrent request loads.

Recommended defensive actions

• Verify MongoDB server version and check for updates
• Assess concurrent request load and potential impact
• Implement compensating controls to limit memory consumption
• 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 entry provide details on the vulnerability, including its description, CVSS score, and affected versions. Defenders should verify exposure and assess potential impact, focusing on MongoDB server deployments, especially those with concurrent request loads. The vulnerability can cause significant memory amplification, leading to potential denial of service. Verification of MongoDB server version and implementation of compensating controls are recommended. Evidence is limited to public CVE details and NVD analysis.

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.