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 1.1 and SAML 2.0 token validation does not correctly resolve the issuer signing key or require signed tokens when IdentityConfiguration is used with federated bindings, allowing an unauthenticated remote attacker to impersonate any principal the trusted STS could issue. This issue is fixed in versions 1.8.1 and 1.9.1.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-xjr9-gg9q-jx3v | CoreWCF: Authentication bypass in CoreWCF SAML 1.1 / 2.0 token signature validation |
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 |
|---|---|---|
| Metrics |
ssvc
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Thu, 09 Jul 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 1.1 and SAML 2.0 token validation does not correctly resolve the issuer signing key or require signed tokens when IdentityConfiguration is used with federated bindings, allowing an unauthenticated remote attacker to impersonate any principal the trusted STS could issue. This issue is fixed in versions 1.8.1 and 1.9.1. | |
| Title | CoreWCF: Authentication bypass in CoreWCF SAML 1.1 / 2.0 token signature validation | |
| Weaknesses | CWE-290 CWE-347 |
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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: 2026-07-09T14:28:40.691Z
Reserved: 2026-06-15T23:23:57.714Z
Link: CVE-2026-54782
Updated: 2026-07-09T14:28:37.093Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-09T09:15:05Z
Github GHSA