CVE-2026-47692

{
  "id": "CVE-2026-47692",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-26T18:16:59.220",
  "lastModified": "2026-10-25T17:10:00.197",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in the header. This can result in smuggled bytes on the upstream request. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3."
    },
    {
      "lang": "es",
      "value": "Envoy es un proxy de borde y de servicio de código abierto diseñado para aplicaciones nativas de la nube. Desde la versión 1.34.0 hasta las versiones 1.35.13, 1.36.9, 1.37.5 y 1.38.3, el generador de encabezados del PROXY Protocolo v2 emite TLVs que exceden la longitud máxima de 65535 bytes, lo que causa una discrepancia entre los bytes escritos y el campo de longitud en el encabezado. Esto puede resultar en bytes contrabandeados en la solicitud ascendente. Esta vulnerabilidad está corregida en las versiones 1.35.13, 1.36.9, 1.37.5 y 1.38.3."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "envoyproxy",
          "product": "envoy",
          "versions": [
            {
              "version": ">= 1.38.0, < 1.38.3",
              "status": "affected"
            },
            {
              "version": ">= 1.37.0, < 1.37.5",
              "status": "affected"
            },
            {
              "version": ">= 1.36.0, < 1.36.9",
              "status": "affected"
            },
            {
              "version": ">= 1.34.0, < 1.35.13",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 1.7,
        "impactScore": 2.7
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-26T19:07:31.350962Z",
          "id": "CVE-2026-47692",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-130"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.34.0",
              "versionEndExcluding": "1.35.13",
              "matchCriteriaId": "FCF9A646-8301-48C6-9A3D-F53AFAE75C39"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.36.0",
              "versionEndExcluding": "1.36.9",
              "matchCriteriaId": "B1146A14-3C49-48C3-BC2A-1BBB202EBD84"
            },
            {
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              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.37.0",
              "versionEndExcluding": "1.37.5",
              "matchCriteriaId": "2057BF79-00D1-4154-9DC0-3F278C72F4E1"
            },
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.38.0",
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  ],
  "references": [
    {
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}