Auth UAF & Crash via $graphLookup Stage in MongoDB Server
CVE-2026-18706 Published on August 11, 2026
Use-After-Free in MongoDB $graphLookup Aggregation Stage Leads to Denial of Service and Potential Remote Code Execution
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.
Vulnerability Analysis
CVE-2026-18706 is exploitable with network access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-18706 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-18706
Want to know whenever a new CVE is published for MongoDB? stack.watch will email you.
Affected Versions
MongoDB Server:- Version 8.3.0 and below 8.3.8 is affected.