MongoDB Crash via Crafted Query Filter (Auth Read)
CVE-2026-18701 Published on August 11, 2026
Type Confusion in MongoDB Query Subsystem Leads to Denial of Service
An issue in MongoDB Server's query subsystem could allow an authenticated user with read privileges to cause the server process to terminate unexpectedly by submitting a specially formed query filter. This could result in a denial of service.
Vulnerability Analysis
CVE-2026-18701 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low 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 an Object Type Confusion Vulnerability?
The program allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
CVE-2026-18701 has been classified to as an Object Type Confusion vulnerability or weakness.
Products Associated with CVE-2026-18701
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Affected Versions
MongoDB Server:- Version 8.3.0 and below 8.3.8 is affected.
- Version 8.0 and below 8.0.29 is affected.
- Version 7.0 and below 7.0.40 is affected.