FKIE_CVE-2026-54779

Vulnerability from fkie_nvd - Published: 2026-07-08 23:16 - Updated: 2026-07-09 16:29
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
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 SAML token replay protection is inoperative because DefaultTokenReplayCache.TryAdd does not reject duplicate tokens when DetectReplayedTokens is enabled, allowing a captured token to be reused. This issue is fixed in versions 1.8.1 and 1.9.1.
References
security-advisories@github.comhttps://github.com/CoreWCF/CoreWCF/commit/3800c4e2bb4c6fde00ddacefdc2221ef33d55621
security-advisories@github.comhttps://github.com/CoreWCF/CoreWCF/commit/7b0b5231cf21b4b5c1fc3caac9981f8bee43823f
security-advisories@github.comhttps://github.com/CoreWCF/CoreWCF/commit/84f8cff5a786b5aaa73448cb379d366a7df98238
security-advisories@github.comhttps://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1
security-advisories@github.comhttps://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1
security-advisories@github.comhttps://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-9jr3-rj99-8jq3
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "CoreWCF",
          "vendor": "CoreWCF",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.9.0, \u003c 1.9.1"
            },
            {
              "status": "affected",
              "version": "\u003c 1.8.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "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 SAML token replay protection is inoperative because DefaultTokenReplayCache.TryAdd does not reject duplicate tokens when DetectReplayedTokens is enabled, allowing a captured token to be reused. This issue is fixed in versions 1.8.1 and 1.9.1."
    }
  ],
  "id": "CVE-2026-54779",
  "lastModified": "2026-07-09T16:29:14.203",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "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"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54779",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T14:17:49.549188Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-08T23:16:55.630",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/3800c4e2bb4c6fde00ddacefdc2221ef33d55621"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/7b0b5231cf21b4b5c1fc3caac9981f8bee43823f"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/CoreWCF/CoreWCF/commit/84f8cff5a786b5aaa73448cb379d366a7df98238"
    },
    {
      "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-9jr3-rj99-8jq3"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-294"
        },
        {
          "lang": "en",
          "value": "CWE-613"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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