CVE-2026-82059

MEDIUM CVSS 4.0: 6.0 EPSS 0.37%
Updated Sep 16, 2026
MongoDB
Parameter Value
CVSS 6.0 (MEDIUM)
Affected Versions 7.0.0 — 8.3.9
Fixed In 7.0.41
Type CWE-617
Vendor MongoDB
Public PoC No

An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.

Attack Parameters

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

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)

Vulnerable Products 3

Configuration From (including) Up to (excluding)
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
7.0.0 7.0.41
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
8.0.0 8.0.30
Mongodb Mongodb
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
8.3.0 8.3.9