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    2 vulnerabilities by argoproj-labs

    CVE-2026-82456 (GCVE-0-2026-82456)

    Vulnerability from nvd – Published: 2026-08-29 13:47 – Updated: 2026-08-29 13:47
    VLAI
    Title
    argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
    Summary
    argocd-mcp 0.8.0 binds its HTTP transport to every network interface and accepts MCP sessions without requiring caller credentials when ARGOCD_API_TOKEN is configured. Attackers who can reach the listener can invoke the full tool surface using the operator's stored token to create applications, request syncs, and modify Argo CD resources.
    Severity
    10 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
    10 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    CWE
    • CWE-1327 - Binding to an Unrestricted IP Address
    Assigner
    References
    Impacted products
    Vendor Product Version
    argoproj-labs argocd-mcp Affected: 0.8.0 , < 0.9.0 (semver)
    		Create a notification for this product.
    Date Public
    2026-08-25 00:00
    Credits
    shmulc8
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/argoproj-labs/mcp-for-argocd",
          "defaultStatus": "unaffected",
          "product": "argocd-mcp",
          "repo": "https://github.com/argoproj-labs/mcp-for-argocd",
          "vendor": "argoproj-labs",
          "versions": [
            {
              "lessThan": "0.9.0",
              "status": "affected",
              "version": "0.8.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "shmulc8"
        }
      ],
      "datePublic": "2026-08-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "argocd-mcp 0.8.0 binds its HTTP transport to every network interface and accepts MCP sessions without requiring caller credentials when ARGOCD_API_TOKEN is configured. Attackers who can reach the listener can invoke the full tool surface using the operator\u0027s stored token to create applications, request syncs, and modify Argo CD resources."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "Binding to an Unrestricted IP Address",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T13:47:57.447Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-rp45-5x3v-48mr)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/argoproj-labs/mcp-for-argocd/security/advisories/GHSA-rp45-5x3v-48mr"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/argoproj-labs/mcp-for-argocd"
        },
        {
          "name": "VulnCheck Advisory: argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/argocd-mcp-0.8.0-authentication-bypass-via-unauthenticated-http"
        }
      ],
      "title": "argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP",
      "x_generator": {
        "engine": "vulncheck-endgame"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-82456",
    "datePublished": "2026-08-29T13:47:57.447Z",
    "dateReserved": "2026-08-29T13:22:59.955Z",
    "dateUpdated": "2026-08-29T13:47:57.447Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-82456 (GCVE-0-2026-82456)

    Vulnerability from cvelistv5 – Published: 2026-08-29 13:47 – Updated: 2026-08-29 13:47
    VLAI
    Title
    argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
    Summary
    argocd-mcp 0.8.0 binds its HTTP transport to every network interface and accepts MCP sessions without requiring caller credentials when ARGOCD_API_TOKEN is configured. Attackers who can reach the listener can invoke the full tool surface using the operator's stored token to create applications, request syncs, and modify Argo CD resources.
    Severity
    10 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
    10 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    CWE
    • CWE-1327 - Binding to an Unrestricted IP Address
    Assigner
    References
    Impacted products
    Vendor Product Version
    argoproj-labs argocd-mcp Affected: 0.8.0 , < 0.9.0 (semver)
    		Create a notification for this product.
    Date Public
    2026-08-25 00:00
    Credits
    shmulc8
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/argoproj-labs/mcp-for-argocd",
          "defaultStatus": "unaffected",
          "product": "argocd-mcp",
          "repo": "https://github.com/argoproj-labs/mcp-for-argocd",
          "vendor": "argoproj-labs",
          "versions": [
            {
              "lessThan": "0.9.0",
              "status": "affected",
              "version": "0.8.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "shmulc8"
        }
      ],
      "datePublic": "2026-08-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "argocd-mcp 0.8.0 binds its HTTP transport to every network interface and accepts MCP sessions without requiring caller credentials when ARGOCD_API_TOKEN is configured. Attackers who can reach the listener can invoke the full tool surface using the operator\u0027s stored token to create applications, request syncs, and modify Argo CD resources."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1327",
              "description": "Binding to an Unrestricted IP Address",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T13:47:57.447Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-rp45-5x3v-48mr)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/argoproj-labs/mcp-for-argocd/security/advisories/GHSA-rp45-5x3v-48mr"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/argoproj-labs/mcp-for-argocd"
        },
        {
          "name": "VulnCheck Advisory: argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/argocd-mcp-0.8.0-authentication-bypass-via-unauthenticated-http"
        }
      ],
      "title": "argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
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    "dateReserved": "2026-08-29T13:22:59.955Z",
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