CVE-2026-13074

Analyzed Analyzed - Analysis Complete

Unauthenticated CPU Exhaustion in MongoDB Server

Publication date: 2026-07-22

Last updated on: 2026-08-18

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-22

Last Modified

2026-08-18

Generated

2026-09-01

AI Q&A

2026-07-22

EPSS Evaluated

2026-08-30

NVD

CVE-2026-13074

EUVD

EUVD-2026-47787

Affected Vendors & Products

Vendor	Product	Version / Range
mongodb	mongodb	From 7.0.0 (inc) to 7.0.39 (exc)
mongodb	mongodb	From 8.0.0 (inc) to 8.0.28 (exc)
mongodb	mongodb	From 8.2.0 (inc) to 8.2.12 (exc)
mongodb	mongodb	From 8.3.0 (inc) to 8.3.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

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.

Compliance Impact

This vulnerability could impact compliance with GDPR and HIPAA by degrading server availability through excessive CPU consumption, potentially leading to denial of service and affecting data processing integrity and availability requirements.

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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