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CVE-2026-82058
Published:September 08, 2026
Updated:September 22, 2026
A flaw in MongoDB's JSON Schema validation error generation code allows an authenticated user with readWrite privileges to crash the mongod server. When a BSON document containing an array with a malformed numeric field name fails a $jsonSchema items type constraint, the error generation path performs unsafe numeric conversion on the user-controlled field name without proper exception handling, resulting in an uncaught exception that terminates the server process. This is possible because incoming wire protocol BSON validation does not enforce that array element field names are valid, in-range numeric indices.
Affected Packages
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r8.3.0 <r8.3.9
Fix Suggestion:
Update to version r8.3.9
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r7.0.0 <r7.0.41
Fix Suggestion:
Update to version r7.0.41
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r8.0.0 <r8.0.30
Fix Suggestion:
Update to version r8.0.30
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncaught Exception
EPSS
Base Score:
0.28