CVE-2026-13074
Received Received - Intake

Unauthenticated CPU Exhaustion in MongoDB Server

Publication date: 2026-07-22

Last updated on: 2026-07-22

Assigner: MongoDB, Inc.

Description
An unauthenticated remote client can cause excessive CPU consumption on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's handling of this combination results in a response loop that bypasses normal throttling, allowing a small number of connections to degrade server availability.

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Meta Information

Published
2026-07-22
Last Modified
2026-07-22
Generated
2026-07-23
AI Q&A
2026-07-22
EPSS Evaluated
N/A
NVD
CVE-2026-13074
EUVD
EUVD-2026-47787

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mongodb mongodb *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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Executive Summary

This vulnerability allows an unauthenticated remote client to consume excessive CPU resources on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's response handling creates a loop that bypasses normal throttling, causing a small number of connections to degrade server availability.

Detection Guidance

Monitor MongoDB server CPU usage for unexpected spikes. Check for excessive connections using the awaitable hello command in exhaust mode. Use MongoDB logs to identify unusual parameter combinations in client requests.

Impact Analysis

This vulnerability can lead to degraded server performance or complete unavailability due to high CPU consumption. It may cause slow response times, service interruptions, or crashes for legitimate users trying to access the MongoDB server.

Mitigation Strategies

Upgrade MongoDB to the latest patched version. Restrict network access to MongoDB servers using firewalls. Monitor and limit connection rates from clients.

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