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 SAML token validation does not enforce SubjectConfirmation method URIs or holder-of-key proof keys in SamlSecurityTokenHandler, allowing holder-of-key downgrade or custom confirmation method assertions to authenticate a subject without proving authority over the assertion. This issue is fixed in versions 1.8.1 and 1.9.1.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-48pq-2xq3-c2m4 | CoreWCF: SAML SubjectConfirmation methods and holder-of-key proof keys are not enforced |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 09 Jul 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Wed, 08 Jul 2026 23:45:00 +0000
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| First Time appeared |
Corewcf
Corewcf corewcf |
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| Vendors & Products |
Corewcf
Corewcf corewcf |
Wed, 08 Jul 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 SAML token validation does not enforce SubjectConfirmation method URIs or holder-of-key proof keys in SamlSecurityTokenHandler, allowing holder-of-key downgrade or custom confirmation method assertions to authenticate a subject without proving authority over the assertion. This issue is fixed in versions 1.8.1 and 1.9.1. | |
| Title | CoreWCF: SAML SubjectConfirmation methods and holder-of-key proof keys are not enforced | |
| Weaknesses | CWE-287 CWE-345 |
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| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-09T14:40:11.234Z
Reserved: 2026-06-15T23:23:57.714Z
Link: CVE-2026-54781
Updated: 2026-07-09T14:31:13.941Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-09T03:45:03Z
Github GHSA