CVE-2026-34163 (GCVE-0-2026-34163)

Vulnerability from cvelistv5 – Published: 2026-03-31 13:43 – Updated: 2026-03-31 15:37
VLAI
Title
Server-Side Request Forgery via MCP Tools Endpoint in FastGPT
Summary
FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT's MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
labring FastGPT Affected: < 4.14.9.5
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34163",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T15:37:50.933430Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T15:37:59.791Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "FastGPT",
          "vendor": "labring",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.14.9.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT\u0027s MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-31T13:43:11.068Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv"
        },
        {
          "name": "https://github.com/labring/FastGPT/pull/6640",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labring/FastGPT/pull/6640"
        },
        {
          "name": "https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00"
        },
        {
          "name": "https://github.com/labring/FastGPT/releases/tag/v4.14.9.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labring/FastGPT/releases/tag/v4.14.9.5"
        }
      ],
      "source": {
        "advisory": "GHSA-x9vj-5m4j-9mfv",
        "discovery": "UNKNOWN"
      },
      "title": "Server-Side Request Forgery via MCP Tools Endpoint in FastGPT"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34163",
    "datePublished": "2026-03-31T13:43:11.068Z",
    "dateReserved": "2026-03-25T20:12:04.197Z",
    "dateUpdated": "2026-03-31T15:37:59.791Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-34163",
      "date": "2026-08-06",
      "epss": "0.00283",
      "percentile": "0.20492"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-34163\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-03-31T15:16:17.170\",\"lastModified\":\"2026-07-24T21:10:00.143\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT\u0027s MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5.\"},{\"lang\":\"es\",\"value\":\"FastGPT es una plataforma de creaci\u00f3n de agentes de IA. Antes de la versi\u00f3n 4.14.9.5, los endpoints de herramientas MCP (Model Context Protocol) de FastGPT (/api/core/app/mcpTools/getTools y /api/core/app/mcpTools/runTool) aceptan un par\u00e1metro URL proporcionado por el usuario y realizan solicitudes HTTP del lado del servidor a este sin validar si la URL apunta a una direcci\u00f3n de red interna/privada. Aunque la aplicaci\u00f3n tiene una funci\u00f3n isInternalAddress() dedicada para la protecci\u00f3n SSRF (utilizada en otros endpoints como el nodo de flujo de trabajo HTTP), los endpoints de herramientas MCP no llaman a esta funci\u00f3n. Un atacante autenticado puede usar estos endpoints para escanear redes internas, acceder a servicios de metadatos en la nube e interactuar con servicios internos como MongoDB y Redis. Este problema ha sido parcheado en la versi\u00f3n 4.14.9.5.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"labring\",\"product\":\"FastGPT\",\"versions\":[{\"version\":\"\u003c 4.14.9.5\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N\",\"baseScore\":7.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":4.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N\",\"baseScore\":7.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":4.0}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-03-31T15:37:50.933430Z\",\"id\":\"CVE-2026-34163\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:fastgpt:fastgpt:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.14.9.5\",\"matchCriteriaId\":\"DE20269A-5497-4727-B3DD-3EDC1E1F234E\"}]}]}],\"references\":[{\"url\":\"https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/labring/FastGPT/pull/6640\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://github.com/labring/FastGPT/releases/tag/v4.14.9.5\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Product\",\"Release Notes\"]},{\"url\":\"https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Mitigation\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-04-01T17:03:31+00:00",
      "cve": "CVE-2026-34163",
      "id": "CVE-2026-34163",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Server-Side Request Forgery via MCP Tools Endpoint in FastGPT",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34163.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-34163\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-31T15:37:50.933430Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-31T15:37:55.690Z\"}}], \"cna\": {\"title\": \"Server-Side Request Forgery via MCP Tools Endpoint in FastGPT\", \"source\": {\"advisory\": \"GHSA-x9vj-5m4j-9mfv\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"labring\", \"product\": \"FastGPT\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 4.14.9.5\"}]}], \"references\": [{\"url\": \"https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv\", \"name\": \"https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/labring/FastGPT/pull/6640\", \"name\": \"https://github.com/labring/FastGPT/pull/6640\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00\", \"name\": \"https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/labring/FastGPT/releases/tag/v4.14.9.5\", \"name\": \"https://github.com/labring/FastGPT/releases/tag/v4.14.9.5\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT\u0027s MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-918\", \"description\": \"CWE-918: Server-Side Request Forgery (SSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-31T13:43:11.068Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-34163\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-31T15:37:59.791Z\", \"dateReserved\": \"2026-03-25T20:12:04.197Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-31T13:43:11.068Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.