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OpenAdvisories
High · 7.4 CVE-2026-54783 EUVD-2026-42469GHSA-gqv6-pwcg-87r8

CoreWCF: XML Signature Wrapping in WS-Security endorsing/supporting signature verification allows replay of captured signed messages

Published Jul 8, 2026 · Updated Jul 10, 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, CoreWCF WS-Security endorsing and supporting signature verification does not ensure the selected ds:Signature covers the expected Security header target, allowing an attacker with one captured signed SOAP envelope to replay arbitrary service operations as the victim principal. 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-gqv6-pwcg-87r8
NuGet CoreWCF.Primitives >= 1.9.0, < 1.9.1 1.9.1 GHSA-gqv6-pwcg-87r8

References