CVE-2026-54773

MediumCVSS 5.9/10Last modified Jul 10, 2026

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 signature verification performs a document-wide ds:Signature lookup, allowing an unauthenticated remote attacker to place a SOAP header before wsse:Security and cause WSSecurityOneDotZeroReceiveSecurityHeader to verify an attacker-supplied signature instead of the security header signature. This issue is fixed in versions 1.8.1 and 1.9.1.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-347

Affected software

No affected versions have been published.

Timeline

Published
Jul 8, 2026
Last modified
Jul 10, 2026
NVD status
Deferred

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CVE-2026-54773: Medium severity, CVSS 5.9 | Vulnix