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CVE-2026-9750 MongoDB CVE debrief

CVE-2026-9750 is a HIGH-severity vulnerability (CVSS Score: 7.1) affecting an unknown vendor and product. An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.

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 servers should be aware of this vulnerability and take necessary precautions to prevent exploitation.

Technical summary

The vulnerability exists due to insufficient separation between user-controlled document fields and internal metadata in certain execution paths. An authenticated user can create documents that interfere with internal metadata processing during query execution, causing the MongoDB server to crash or return incorrect results.

Defensive priority

high

Recommended defensive actions

  • Apply patches or updates provided by the vendor as soon as they become available.
  • Restrict access to the MongoDB server to only trusted users.
  • Monitor MongoDB server logs for suspicious activity.

Evidence notes

The CVE record was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-9750) and additional details can be found on [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-9750). A source reference is available at [ref-4](https://jira.mongodb.org/browse/SERVER-123633).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9750 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9750

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

  • CVE-2026-9750 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9750

    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.