{"id":"CVE-2026-54780","summary":"CoreWCF: WS-Security Reference DigestMethod Algorithm-Suite Bypass","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, the CoreWCF WS-Security 1.0 receive pipeline validates ds:SignedInfo SignatureMethod against the configured SecurityAlgorithmSuite but does not validate each ds:Reference DigestMethod, allowing a sender to use a rejected digest algorithm such as SHA-1 while the message is still accepted. This issue is fixed in versions 1.8.1 and 1.9.1.","aliases":["GHSA-4v55-cpmv-3vcm"],"modified":"2026-07-15T01:48:58.258412739Z","published":"2026-07-08T22:15:06.161Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-327","CWE-757"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54780.json"},"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-2026-54780.json"},{"type":"ADVISORY","url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-4v55-cpmv-3vcm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54780"},{"type":"FIX","url":"https://github.com/CoreWCF/CoreWCF/commit/58742312117cc671e6e9c694c2f5f9f669c17136"},{"type":"FIX","url":"https://github.com/CoreWCF/CoreWCF/commit/9104e581cff3d047ace5e179bfae86807a44be1f"},{"type":"FIX","url":"https://github.com/CoreWCF/CoreWCF/commit/fea67b2cd73a5a85115c325d504303ec7382e133"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/corewcf/corewcf","events":[{"introduced":"39b2f02978e497955a560c72b5ccdff5c0dbcda1"},{"introduced":"0"},{"fixed":"1f7a0811da5128db40fd7b868ae0aac0c581f91f"},{"fixed":"7c0920fe16adc497efae82881ac0f1e4d7ac98d0"},{"fixed":"58742312117cc671e6e9c694c2f5f9f669c17136"},{"fixed":"9104e581cff3d047ace5e179bfae86807a44be1f"},{"fixed":"fea67b2cd73a5a85115c325d504303ec7382e133"}],"database_specific":{"extracted_events":[{"introduced":"1.9.0"},{"fixed":"1.9.1"},{"introduced":"0"},{"fixed":"1.8.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.8.0","v1.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54780.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:L/A:N"}]}