CVE-2026-11933

HIGH CVSS 4.0: 8.7 EPSS 0.38%
Updated Jun 22, 2026
MongoDB
Parameter Value
CVSS 8.7 (HIGH)
Affected Versions 4.4.0 — 8.3.4
Fixed In 4.4.31
Type CWE-416 (Use After Free), CWE-787 (Out-of-bounds Write)
Vendor MongoDB
Public PoC No

A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Vulnerable Products 7

Configuration From (including) Up to (excluding)
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
4.4.0 4.4.31
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
5.0.0 5.0.34
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
6.0.0 6.0.29
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
7.0.0 7.0.37
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
8.0.0 8.0.26
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
8.2.0 8.2.11
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
8.3.0 8.3.4