{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.9.0"
              },
              {
                "fixed": "1.9.1"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "1.8.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "39b2f02978e497955a560c72b5ccdff5c0dbcda1"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "1f7a0811da5128db40fd7b868ae0aac0c581f91f"
            },
            {
              "fixed": "7c0920fe16adc497efae82881ac0f1e4d7ac98d0"
            },
            {
              "fixed": "65d09022749854ba943e376aefb958dec05b00d8"
            },
            {
              "fixed": "b914495ce63c44924664643b60a262e7595081a4"
            },
            {
              "fixed": "e7454132876ecc7e2cf80e541a44376eeb54979b"
            }
          ],
          "repo": "https://github.com/corewcf/corewcf",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rpj7-hr7h-w6p9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-345",
      "CWE-347"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54774.json"
  },
  "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, SamlSerializer skips final SignatureValue verification when a CoreWCF service validates SAML tokens using a non-X.509 signing token, allowing an attacker to reference a non-X.509 SecurityToken key identifier and bypass assertion signature verification. This issue is fixed in versions 1.8.1 and 1.9.1.",
  "id": "CVE-2026-54774",
  "modified": "2026-07-11T03:54:07.215927437Z",
  "published": "2026-07-08T22:17:07.314Z",
  "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-2026-54774.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-rpj7-hr7h-w6p9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54774"
    },
    {
      "type": "FIX",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/65d09022749854ba943e376aefb958dec05b00d8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/b914495ce63c44924664643b60a262e7595081a4"
    },
    {
      "type": "FIX",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/e7454132876ecc7e2cf80e541a44376eeb54979b"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CoreWCF: SamlSerializer skips SignatureValue verification when SAML signing token is not an X.509 certificate"
}