{"id":"GHSA-jc6x-rj79-w4mx","summary":"CoreWCF: WS-Security signature substitution via document-wide Signature lookup","details":"### Impact\nAn unauthenticated remote attacker who can place a SOAP header lexically before `wsse:Security` can embed a `ds:Signature` of their choosing inside that header and cause the server to verify the attacker-supplied signature instead of the one carried in the security header.\n\n#### Preconditions\nExploitation requires the endpoint be configured with an endorsing supporting token binding, and the attacker constructs a `ds:Signature` whose `KeyInfo` resolves through the receive-side token resolver to a key under the attacker’s control. Both are conditions outside the attacker’s direct control on a generic deployment.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nUse a security token resolver that only accepts references to issuer-pinned X.509 chains (the default when expecting a static set of signing certificates).","aliases":["CVE-2026-54773"],"modified":"2026-06-19T21:11:30.211178Z","published":"2026-06-19T20:46:43Z","database_specific":{"github_reviewed_at":"2026-06-19T20:46:43Z","nvd_published_at":null,"cwe_ids":["CWE-347"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-jc6x-rj79-w4mx"},{"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-jc6x-rj79-w4mx/GHSA-jc6x-rj79-w4mx.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-jc6x-rj79-w4mx/GHSA-jc6x-rj79-w4mx.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:N/I:H/A:N"}]}