{
  "affected": [
    {
      "affectedData": [
        {
          "product": "aiohttp",
          "vendor": "aio-libs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.14.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2."
    },
    {
      "lang": "es",
      "value": "AIOHTTP es un framework cliente/servidor HTTP as\u00edncrono para asyncio y Python. Antes de la versi\u00f3n 3.14.2, los analizadores HTTP eran vulnerables a un ataque de contrabando de solicitudes relacionado con las actualizaciones de WebSocket. Si se utiliza el componente del lado del servidor, un atacante podr\u00eda ejecutar una vulnerabilidad de contrabando de solicitudes utilizando un caso l\u00edmite en el procedimiento de actualizaci\u00f3n de WebSocket. Una solicitud de actualizaci\u00f3n de WebSocket con un cuerpo podr\u00eda hacer que el analizador cambiara de protocolo antes de que se recibiera el cuerpo completo de la solicitud, dejando bytes restantes para ser manejados como datos de protocolo actualizado o canalizados en lugar de datos normales del cuerpo HTTP. Este problema est\u00e1 solucionado en la versi\u00f3n 3.14.2."
    }
  ],
  "id": "CVE-2026-69243",
  "lastModified": "2026-10-23T21:10:00.157",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-69243",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-05T14:53:55.109986Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-03T21:16:42.113",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/aio-libs/aiohttp/pull/13017"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.14.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22v"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}