{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.3.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2dfa1798f0b026d781efd5e0bc4e6d9a5cfcec3e"
            }
          ],
          "repo": "https://github.com/ktorio/ktor",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "In Ktor before 1.3.0, request smuggling is possible when running behind a proxy that doesn't handle Content-Length and Transfer-Encoding properly or doesn't handle \\n as a headers separator.",
  "id": "CVE-2020-5207",
  "modified": "2026-03-13T21:46:31.775704043Z",
  "published": "2020-01-27T20:15:10.980Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433v"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ktorio/ktor/pull/1547"
    }
  ],
  "related": [
    "GHSA-xrr9-rh8p-433v"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}