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OpenAdvisories
Low · 3.7 CVE-2026-54780 EUVD-2026-42467GHSA-4v55-cpmv-3vcm

CoreWCF: WS-Security Reference DigestMethod Algorithm-Suite Bypass

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, the CoreWCF WS-Security 1.0 receive pipeline validates ds:SignedInfo SignatureMethod against the configured SecurityAlgorithmSuite but does not validate each ds:Reference DigestMethod, allowing a sender to use a rejected digest algorithm such as SHA-1 while the message is still accepted. 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.Primitives < 1.8.1 1.8.1 GHSA-4v55-cpmv-3vcm
NuGet CoreWCF.Primitives >= 1.9.0, < 1.9.1 1.9.1 GHSA-4v55-cpmv-3vcm

References