CVE-2026-54773 (GCVE-0-2026-54773)

Vulnerability from cvelistv5 – Published: 2026-07-08 22:09 – Updated: 2026-07-08 22:10
VLAI
Title
CoreWCF: WS-Security signature substitution via document-wide Signature lookup
Summary
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.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
CoreWCF CoreWCF Affected: >= 1.9.0, < 1.9.1
Affected: < 1.8.1
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      "affected": [
        {
          "product": "CoreWCF",
          "vendor": "CoreWCF",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.9.0, \u003c 1.9.1"
            },
            {
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              "version": "\u003c 1.8.1"
            }
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      ],
      "descriptions": [
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        }
      ],
      "metrics": [
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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            {
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              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T22:10:26.712Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
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          "tags": [
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        },
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5"
        },
        {
          "name": "https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247"
        },
        {
          "name": "https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2"
        },
        {
          "name": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1"
        },
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          "name": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1"
        }
      ],
      "source": {
        "advisory": "GHSA-jc6x-rj79-w4mx",
        "discovery": "UNKNOWN"
      },
      "title": "CoreWCF: WS-Security signature substitution via document-wide Signature lookup"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54773",
    "datePublished": "2026-07-08T22:09:32.584Z",
    "dateReserved": "2026-06-15T23:23:57.713Z",
    "dateUpdated": "2026-07-08T22:10:26.712Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-54773",
      "date": "2026-07-09",
      "epss": "0.00238",
      "percentile": "0.14745"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-54773\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-08T23:16:54.960\",\"lastModified\":\"2026-07-09T16:29:14.203\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"CoreWCF\",\"product\":\"CoreWCF\",\"versions\":[{\"version\":\"\u003e= 1.9.0, \u003c 1.9.1\",\"status\":\"affected\"},{\"version\":\"\u003c 1.8.1\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-347\"}]}],\"references\":[{\"url\":\"https://github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-jc6x-rj79-w4mx\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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