CVE-2026-82064 is a vulnerability in MongoDB
Published on September 8, 2026
Unauthenticated Denial of Service in MongoDB Server via Assertion Failure in Read Concern Processing on Replica Set Members
A security issue in MongoDB Server allows an unauthenticated network user to cause a denial of service on a specific type of replica set member. The server contains an assertion in its read concern processing logic that can be reached without authentication, and the assertion's assumptions about internal state do not hold for all member configurations, causing the server process to terminate.
Vulnerability Analysis
CVE-2026-82064 is exploitable with network access, and does not require authorization privileges or user interaction. 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-2026-82064 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2026-82064
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Affected Versions
MongoDB Server:- Version 8.3.0 and below 8.3.9 is affected.
- Version 8.0.0 and below 8.0.30 is affected.
- Version 7.0.0 and below 7.0.41 is affected.