{"id":"GHSA-rpj7-hr7h-w6p9","summary":"CoreWCF: SamlSerializer skips SignatureValue verification when SAML signing token is not an X.509 certificate","details":"### Impact\nWhen a service is configured to validate SAML tokens using a method other than X.509 certificate signing, the final signature verification is skipped.\n\n#### Preconditions\nThe service is configured to authenticate using SAML tokens and an out of band token resolver (commonly the IssuerTokenResolver of IssuedTokenServiceCredential) holds a non-X.509 SecurityToken whose key identifier the attacker can reference in the assertion’s `\u003cKeyInfo\u003e` - for example a `BinarySecretSecurityToken` representing the symmetric proof key issued by a WS-Trust symmetric-key holder-of-key STS.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nNone","aliases":["CVE-2026-54774"],"modified":"2026-06-19T21:11:30.138754Z","published":"2026-06-19T20:46:46Z","database_specific":{"cwe_ids":["CWE-345","CWE-347"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-06-19T20:46:46Z","nvd_published_at":null},"references":[{"type":"WEB","url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-rpj7-hr7h-w6p9"},{"type":"PACKAGE","url":"https://github.com/CoreWCF/CoreWCF"}],"affected":[{"package":{"name":"CoreWCF.Primitives","ecosystem":"NuGet","purl":"pkg:nuget/CoreWCF.Primitives"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1"}]}],"versions":["0.1.0","0.1.0-preview","0.1.0-preview-2","0.2.0","0.2.1","0.3.0","0.3.1","0.3.2","0.4.0","1.0.0","1.0.0-preview1","1.0.0-preview2","1.0.1","1.0.2","1.1.0","1.1.1","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","1.4.0","1.4.0-preview1","1.4.1","1.4.2","1.5.0","1.5.0-preview1","1.5.1","1.5.2","1.6.0","1.7.0","1.8.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-rpj7-hr7h-w6p9/GHSA-rpj7-hr7h-w6p9.json"}},{"package":{"name":"CoreWCF.Primitives","ecosystem":"NuGet","purl":"pkg:nuget/CoreWCF.Primitives"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.9.0"},{"fixed":"1.9.1"}]}],"versions":["1.9.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-rpj7-hr7h-w6p9/GHSA-rpj7-hr7h-w6p9.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}