Vulnerability-Lookup

GHSA-9JR3-RJ99-8JQ3

Vulnerability from github – Published: 2026-06-19 20:47 – Updated: 2026-06-19 20:47

Summary

CoreWCF: SAML token replay protection is inoperative

Details

Impact

When enabling DetectReplayedTokens, a token can be replayed and will be detected despite it being reused.

Patches

Fixed in CoreWCF v1.8.1 and v1.9.1

Workarounds

Provide your own implementation of ITokenReplayCache with the correct behavior.

Severity

5.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "CoreWCF.Primitives"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "CoreWCF.Primitives"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.9.0"
            },
            {
              "fixed": "1.9.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54779"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-294",
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T20:47:02Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nWhen enabling DetectReplayedTokens, a token can be replayed and will be detected despite it being reused.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nProvide your own implementation of `ITokenReplayCache` with the correct behavior.",
  "id": "GHSA-9jr3-rj99-8jq3",
  "modified": "2026-06-19T20:47:02Z",
  "published": "2026-06-19T20:47:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-9jr3-rj99-8jq3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/CoreWCF/CoreWCF"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CoreWCF: SAML token replay protection is inoperative"
}

CVE-2026-54779 (GCVE-0-2026-54779)

Vulnerability from cvelistv5 – Published: 2026-07-08 22:07 – Updated: 2026-07-09 14:17

Title

CoreWCF: SAML token replay protection is inoperative

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.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-294 - Authentication Bypass by Capture-replay
CWE-613 - Insufficient Session Expiration

Assigner

GitHub_M

References

6 references

URL	Tags
https://github.com/CoreWCF/CoreWCF/security/advis…	x_refsource_CONFIRM
https://github.com/CoreWCF/CoreWCF/commit/3800c4e…	x_refsource_MISC
https://github.com/CoreWCF/CoreWCF/commit/7b0b523…	x_refsource_MISC
https://github.com/CoreWCF/CoreWCF/commit/84f8cff…	x_refsource_MISC
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1	x_refsource_MISC
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
CoreWCF	CoreWCF	Affected: >= 1.9.0, < 1.9.1 Affected: < 1.8.1

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54779",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T14:17:49.549188Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "product": "CoreWCF",
          "vendor": "CoreWCF",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.9.0, \u003c 1.9.1"
            },
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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",
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        {
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        },
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          "tags": [
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          "url": "https://github.com/CoreWCF/CoreWCF/commit/3800c4e2bb4c6fde00ddacefdc2221ef33d55621"
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        },
        {
          "name": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1",
          "tags": [
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          "url": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1"
        },
        {
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          "url": "https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1"
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      "source": {
        "advisory": "GHSA-9jr3-rj99-8jq3",
        "discovery": "UNKNOWN"
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      "title": "CoreWCF: SAML token replay protection is inoperative"
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  "cveMetadata": {
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    "datePublished": "2026-07-08T22:07:46.453Z",
    "dateReserved": "2026-06-15T23:23:57.714Z",
    "dateUpdated": "2026-07-09T14:17:57.224Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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