CVE-2026-54783
High · 7.4CVSS
7.4
EPSS
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Published
Jul 8, 2026
CISA due date
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The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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