{
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      {
        "metrics": [
          {
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              "content": {
                "id": "CVE-2026-34525",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-02T15:13:27.201947Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-04-02T16:24:11.311Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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        {
          "product": "aiohttp",
          "vendor": "aio-libs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.13.4"
            }
          ]
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      "descriptions": [
        {
          "lang": "en",
          "value": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
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      ],
      "problemTypes": [
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          ]
        },
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          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
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              "type": "CWE"
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          ]
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      "providerMetadata": {
        "dateUpdated": "2026-04-01T20:28:46.652Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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      "references": [
        {
          "name": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67",
          "tags": [
            "x_refsource_CONFIRM"
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          "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67"
        },
        {
          "name": "https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000",
          "tags": [
            "x_refsource_MISC"
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        },
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          "name": "https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349",
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        },
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          "name": "https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4",
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          ],
          "url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4"
        }
      ],
      "source": {
        "advisory": "GHSA-c427-h43c-vf67",
        "discovery": "UNKNOWN"
      },
      "title": "AIOHTTP: Duplicate Host header accepted"
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  },
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    "cveId": "CVE-2026-34525",
    "datePublished": "2026-04-01T20:28:46.652Z",
    "dateReserved": "2026-03-30T16:03:31.048Z",
    "dateUpdated": "2026-04-02T16:24:11.311Z",
    "state": "PUBLISHED"
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}