{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.1.132.Final"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ec119d487b3a27e4ac118e7e1d97f0c96a85f4a3"
            }
          ],
          "repo": "https://github.com/netty/netty",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "4.2.0.Alpha1"
              },
              {
                "fixed": "4.2.10.Final"
              }
            ]
          },
          "events": [
            {
              "introduced": "5451fbb0effd8460f57013bb33aefeb953144ed9"
            },
            {
              "fixed": "4cc98736c3947bc93122e0b64e0bd8fc970c6437"
            }
          ],
          "repo": "https://github.com/netty/netty",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-pwqr-wmgm-9rr8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33870.json"
  },
  "details": "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",
  "modified": "2026-04-01T23:08:56.571878983Z",
  "published": "2026-03-27T19:54:15.586Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33870.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33870"
    },
    {
      "type": "WEB",
      "url": "https://w4ke.info/2025/06/18/funky-chunks.html"
    },
    {
      "type": "WEB",
      "url": "https://w4ke.info/2025/10/29/funky-chunks-2.html"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc9110"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing"
}