CVE-2026-18693

HIGH CVSS 4.0: 7.2 EPSS 0.23%
Updated Aug 12, 2026
MongoDB
Parameter Value
CVSS 7.2 (HIGH)
Type CWE-787 (Out-of-bounds Write)
Vendor MongoDB
Public PoC No

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server accessing memory outside its intended bounds, potentially causing a server crash (denial of service), exposure of limited memory contents, or memory corruption.

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
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)