CVE-2026-42585

{
  "id": "CVE-2026-42585",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-13T19:17:24.187",
  "lastModified": "2026-10-26T17:10:03.270",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty incorrectly parses malformed Transfer-Encoding, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final."
    },
    {
      "lang": "es",
      "value": "Netty es un framework de aplicación de red asíncrono y basado en eventos. Antes de 4.2.13.Final y 4.1.133.Final, Netty analiza incorrectamente Transfer-Encoding malformado, lo que permite ataques de contrabando de solicitudes. Esta vulnerabilidad se corrige en 4.2.13.Final y 4.1.133.Final."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "netty",
          "product": "netty",
          "versions": [
            {
              "version": ">= 4.2.0.Alpha1, < 4.2.13.Final",
              "status": "affected"
            },
            {
              "version": "< 4.1.133.Final",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "io.netty",
          "product": "netty-codec-http",
          "versions": [
            {
              "version": ">= 4.2.0.Alpha1, < 4.2.13.Final",
              "status": "affected"
            },
            {
              "version": "< 4.1.133.Final",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-15T20:33:59.288432Z",
          "id": "CVE-2026-42585",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
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  "references": [
    {
      "url": "https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
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    },
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      "url": "https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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}