FKIE_CVE-2026-33870

Vulnerability from fkie_nvd - Published: 2026-03-27 20:16 - Updated: 2026-03-30 20:12
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
References
security-advisories@github.comhttps://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8Exploit, Mitigation, Vendor Advisory
security-advisories@github.comhttps://w4ke.info/2025/06/18/funky-chunks.htmlTechnical Description
security-advisories@github.comhttps://w4ke.info/2025/10/29/funky-chunks-2.htmlTechnical Description
security-advisories@github.comhttps://www.rfc-editor.org/rfc/rfc9110Technical Description
Impacted products
Vendor Product Version
netty netty *
netty netty *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8F551B7E-5E29-4062-8FDB-AA1377B3E8F5",
              "versionEndExcluding": "4.1.132",
              "vulnerable": true
            },
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            }
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          "negate": false,
          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue."
    }
  ],
  "id": "CVE-2026-33870",
  "lastModified": "2026-03-30T20:12:16.330",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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  "published": "2026-03-27T20:16:34.663",
  "references": [
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      "tags": [
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        "Mitigation",
        "Vendor Advisory"
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    },
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      "tags": [
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      "url": "https://www.rfc-editor.org/rfc/rfc9110"
    }
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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