CVE-2026-54772 Details
Description
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.
A denial-of-service vulnerability has been identified in CoreWCF, specifically in versions prior to 1.8.1 and 1.9.1. This issue allows an unauthenticated remote attacker to cause a thread in the server's thread pool to consume 100% CPU, per connection. The vulnerability arises in the handling of the framing handshake for NetTcpBinding, NetNamedPipeBinding, and UnixDomainSocketBinding endpoints. When the connection is closed after sending a brief preamble, the server fails to progress properly, leading to a timeout issue. The vulnerability can be exploited by establishing multiple connections to the affected service.
Users can upgrade to CoreWCF versions 1.8.1 or 1.9.1, both of which include the necessary fix. Instructions for downloading these versions are available on the NuGet website.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 8, 2026CISA-ADP
Assessed Jul 9, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/CoreWCF/CoreWCF/commit/03ddbced349931a2da6c0efcdf745c0722eff77c | [email protected] | Source CodeVendor |
| https://github.com/CoreWCF/CoreWCF/commit/7ddd966d6e58564a32ab30c825dd693b45a34a55 | [email protected] | Source CodeVendor |
| https://github.com/CoreWCF/CoreWCF/commit/c4212988cd6fd472783d0413426eeac61044097a | [email protected] | Source CodeVendor |
| https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1 | [email protected] | Release NotesVendor |
| https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1 | [email protected] | Release NotesVendor |
| https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-p86g-xrr2-pf7c | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| CoreWCF | 1.8.0 (semver) 1.9.0 (semver) |
CPE
Remediation
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| CoreWCF.ConfigurationManager | All versions |
CPE
Remediation
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| CoreWCF.Http | All versions |
CPE
Remediation
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| CoreWCF.Kafka | All versions |
CPE
Remediation
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| CoreWCF.Kafka.Client | All versions |
CPE
Remediation
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| CoreWCF.MSMQ | All versions |
CPE
Remediation
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| CoreWCF.NetFramingBase | All versions |
CPE
Remediation
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| CoreWCF.NetNamedPipe | All versions |
CPE
Remediation
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| CoreWCF.NetTcp | All versions |
CPE
Remediation
| |
| CoreWCF.Primitives | All versions |
CPE
Remediation
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| CoreWCF.Queue | All versions |
CPE
Remediation
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| CoreWCF.RabbitMQ | All versions |
CPE
Remediation
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| CoreWCF.RabbitMQ.Client | All versions |
CPE
Remediation
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| CoreWCF.Templates | All versions |
CPE
Remediation
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| CoreWCF.UnixDomainSocket | All versions |
CPE
Remediation
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| CoreWCF.WebHttp | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 9, 2026 | CVE Modified | CISA-ADP |
| Jul 8, 2026 | New CVE Received | [email protected] |