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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.

PUBLISHED Reserved 2026-06-15 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-400: Uncontrolled Resource Consumption

CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

Product status

>= 1.9.0, < 1.9.1
affected

< 1.8.1
affected

References

github.com/...oreWCF/security/advisories/GHSA-p86g-xrr2-pf7c

github.com/...ommit/03ddbced349931a2da6c0efcdf745c0722eff77c

github.com/...ommit/7ddd966d6e58564a32ab30c825dd693b45a34a55

github.com/...ommit/c4212988cd6fd472783d0413426eeac61044097a

github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1

github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1

cve.org (CVE-2026-54772)

nvd.nist.gov (CVE-2026-54772)

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