CVE-2026-9740: CWE-674 Uncontrolled Recursion in MongoDB MongoDB Server
A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.
CVE-2026-9740: CWE-674 Uncontrolled Recursion in MongoDB MongoDB Server
Description
A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.
CVSS v4.0
Score 8.7high
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-05-27T17:33:16.187Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2899f18dd33fbd859049cb
Added to database: 6/9/2026, 10:55:45 PM
Last updated: 6/10/2026, 1:39:15 AM
Views: 7
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