MongoDB Awaitable Hello CPU DoS via Exhaust Mode
CVE-2026-13074 Published on July 22, 2026
Awaitable Hello Command in Exhaust Mode Unthrottled Response Loop Leading to Denial of Service
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.
Vulnerability Analysis
CVE-2026-13074 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
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-13074
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Affected Versions
MongoDB Server:- Version 7.0 and below 7.0.39 is affected.
- Version 8.0 and below 8.0.28 is affected.
- Version 8.2.0 and below 8.2.12 is affected.
- Version 8.3.0 and below 8.3.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.