CVE-2026-55450

{
  "id": "CVE-2026-55450",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-23T17:17:08.663",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixed in 1.9.1."
    },
    {
      "lang": "es",
      "value": "Langflow es una herramienta para construir y desplegar agentes y flujos de trabajo impulsados por IA. Antes de la versión 1.9.1, los usuarios no autenticados pueden subir cualquier cantidad de datos al servidor sin ninguna limitación. No se necesita ningún conocimiento previo, solo acceso a la red de Langflow. Esto puede llevar al agotamiento del espacio en el servidor. Además, en la respuesta, la ruta absoluta del archivo subido se informa al atacante, lo que es una fuga de información que puede ayudar a encadenar otras primitivas. Esta vulnerabilidad se corrige en la versión 1.9.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "langflow-ai",
          "product": "langflow",
          "versions": [
            {
              "version": "< 1.9.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Secondary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.7
      }
    ],
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          "timestamp": "2026-06-23T17:00:33.147977Z",
          "id": "CVE-2026-55450",
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            {
              "exploitation": "poc"
            },
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          "role": "CISA Coordinator",
          "version": "2.0.3"
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
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          "lang": "en",
          "value": "CWE-306"
        },
        {
          "lang": "en",
          "value": "CWE-400"
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          "cpeMatch": [
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  "references": [
    {
      "url": "https://github.com/langflow-ai/langflow/pull/12831",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
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}