MongoDB Time-series Query Predicate DoS via metaField
CVE-2026-18695 Published on August 11, 2026
Improper Input Validation in MongoDB Timeseries Query Processing Leads to Denial of Service
An issue in MongoDB Server's handling of certain query predicates against time-series collections with a metaField could allow an authenticated user with write access to cause the server process to terminate unexpectedly, resulting in a denial of service.
Vulnerability Analysis
CVE-2026-18695 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 assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2026-18695 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2026-18695
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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.