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OpenAdvisories
High · 7.5 CVE-2026-54772 EUVD-2026-42462GHSA-p86g-xrr2-pf7c

CoreWCF: Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp / net.pipe / net.uds framing handshake

Published Jul 8, 2026 · Updated Jul 9, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
CoreWCF CoreWCF >= 1.9.0, < 1.9.1, < 1.8.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
NuGet CoreWCF.NetFramingBase < 1.8.1 1.8.1 GHSA-p86g-xrr2-pf7c
NuGet CoreWCF.NetFramingBase >= 1.9.0, < 1.9.1 1.9.1 GHSA-p86g-xrr2-pf7c

References