Flaw in MongoDB's JSON Schema Validation Allows Server Crash
CVE-2026-82058

7.1HIGH

Key Information:

Vendor

Mongodb
Status
Mongodb Server
Vendor
CVE Published:
8 September 2026

What is CVE-2026-82058?

A vulnerability in MongoDB's JSON Schema validation can lead to a server crash. This issue arises when an authenticated user, possessing readWrite permissions, sends a BSON document with an incorrect numeric field name in an array. The schema validation fails due to a malformed field, which triggers unsafe numeric conversion without proper exception handling. Consequently, the server process encounters an uncaught exception that terminates the service. This flaw highlights the need for robust error handling in BSON validation to prevent improper field names from causing system outages.

Affected Version(s)

MongoDB Server 8.3.0 < 8.3.9

MongoDB Server 8.0.0 < 8.0.30

MongoDB Server 7.0.0 < 7.0.41

References

https://jira.mongodb.org/browse/SERVER-130926

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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