CoreWCF up to 1.8.0/1.9.0 EOF net.tcp resource consumption

Summaryinfo

A vulnerability was found in CoreWCF up to 1.8.0/1.9.0. It has been declared as problematic. The impacted element is an unknown function of the file net.tcp of the component EOF Handler. Such manipulation leads to resource consumption. This vulnerability is traded as CVE-2026-54772. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in CoreWCF up to 1.8.0/1.9.0. It has been rated as problematic. Affected by this issue is some unknown processing of the file net.tcp of the component EOF Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, an unauthenticated remote attacker that can reach a NetTcpBinding, NetNamedPipeBinding, or UnixDomainSocketBinding endpoint can trigger premature EOF handling in the CoreWCF net.tcp, net.pipe, or net.uds framing handshake and pin one server thread-pool worker at full CPU per connection. This issue is fixed in versions 1.8.1 and 1.9.1.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-54772 since 06/16/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.8.1 or 1.9.1 eliminates this vulnerability.

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Productinfo

Name

• CoreWCF

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.8.0
• 1.9.0

Website

• Product: https://github.com/CoreWCF/CoreWCF/

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