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PatchSiren cyber security CVE debrief

CVE-2026-9747 MongoDB CVE debrief

CVE-2026-9747 is a HIGH severity vulnerability with a CVSS score of 7.1. The vulnerability is caused by adding 'fromRouter:true' and 'runtimeConstants.userRoles' which could cause aggregations to crash the MongoDB server. The CVE was published on 2026-06-09 and last modified on 2026-06-10.

Vendor
MongoDB
Product
MongoDB Server
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-15
Advisory published
2026-06-09
Advisory updated
2026-06-15

Who should care

Users of MongoDB server may be affected by this vulnerability.

Technical summary

The vulnerability is caused by adding 'fromRouter:true' and 'runtimeConstants.userRoles' which could cause aggregations to crash the MongoDB server.

Defensive priority

HIGH

Recommended defensive actions

  • Review and apply patches or updates from the vendor.
  • Implement compensating controls to mitigate potential impacts.
  • Monitor MongoDB server for unusual activity.

Evidence notes

Vendor and product information is not confirmed. MongoDB may be related based on source evidence.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9747 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9747

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9747 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9747

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.