MongoDB: proxy_protocol header miscount leads to server crash
CVE-2026-1848 Published on February 10, 2026
Connections received from the proxy port may not count towards total accepted connections
Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header.
Vulnerability Analysis
CVE-2026-1848 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 a high impact on 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-2026-1848
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Affected Versions
MongoDB Inc MongoDB Server:- Version 8.2 and below 8.2.4 is affected.
- Version 8.0 and below 8.0.18 is affected.
- Version 7.0 and below 7.0.29 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.