{"id":"CVE-2026-54773","summary":"CoreWCF: WS-Security signature substitution via document-wide Signature lookup","details":"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.","aliases":["GHSA-jc6x-rj79-w4mx"],"modified":"2026-07-15T01:48:55.536189041Z","published":"2026-07-08T22:09:32.584Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54773.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-347"]},"references":[{"type":"WEB","url":"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1"},{"type":"WEB","url":"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54773.json"},{"type":"ADVISORY","url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-jc6x-rj79-w4mx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54773"},{"type":"FIX","url":"https://github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5"},{"type":"FIX","url":"https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247"},{"type":"FIX","url":"https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/corewcf/corewcf","events":[{"introduced":"39b2f02978e497955a560c72b5ccdff5c0dbcda1"},{"introduced":"0"},{"fixed":"1f7a0811da5128db40fd7b868ae0aac0c581f91f"},{"fixed":"7c0920fe16adc497efae82881ac0f1e4d7ac98d0"},{"fixed":"0589692d4b9a41d21b34ac48281e95f6df7f4ce5"},{"fixed":"30aef805270976c42477e3f2a05f4e563d86e247"},{"fixed":"4618f24165ad018ad3ed2636bf8c3bc87d2a3be2"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.9.0"},{"fixed":"1.9.1"},{"introduced":"0"},{"fixed":"1.8.1"}]}}],"versions":["v1.8.0","v1.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54773.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}