Security advisory

{
  "id": "341a262bdb8be19737e7789405fcbf84a48fe93793777aeb12f858ed833d5e4e",
  "url": "https://osv.dev/vulnerability/CVE-2019-19389",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-19389",
    "summary": "JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.",
    "evidence": "osv:CVE-2019-19389",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-19389",
      "aliases": [
        "CVE-2019-19389"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ktorio/ktor",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b24dc693badaa0ee5b13b09b9410ed8505d9742b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jetbrains:ktor:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.2.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.2.5",
            "1.2.4",
            "1.2.3",
            "1.2.3-rc",
            "1.2.2",
            "1.2.1",
            "1.2.0",
            "1.2.0-rc2",
            "1.2.0-rc",
            "1.2.0-alpha-2",
            "1.2.0-alpha-1",
            "1.1.2",
            "1.1.1",
            "1.1.0",
            "1.0.1",
            "1.0.0",
            "1.0.0-rc",
            "1.0.0-beta-4",
            "1.0.0-beta-3",
            "1.0.0-beta-2",
            "1.0.0-beta-1",
            "1.0.0-alpha-3",
            "1.0.0-alpha-2",
            "1.0.0-alpha-1",
            "0.9.5",
            "0.9.4",
            "0.9.4-dev-3",
            "0.9.4-alpha-2",
            "0.9.3-alpha-4",
            "0.9.3-alpha-3",
            "0.9.3-alpha-2",
            "0.9.3-alpha-1",
            "0.9.2",
            "0.9.2-alpha-6",
            "0.9.2-alpha-5",
            "0.9.2-alpha-4",
            "0.9.2-alpha-3",
            "0.9.2-alpha-2",
            "0.9.2-alpha-1",
            "0.9.1",
            "0.9.1-alpha-10",
            "0.9.1-alpha-9",
            "0.9.1-alpha-8",
            "0.9.1-alpha-7",
            "0.9.1-alpha-6",
            "0.9.1-alpha-5",
            "0.9.1-alpha-4",
            "0.9.0",
            "0.9.0-alpha-3",
            "0.9.0-alpha-2",
            "build-0.4.1-alpha-16",
            "ktor-0.4.0",
            "build-0.4.0-alpha-15",
            "build-0.4.0-alpha-14",
            "build-0.4.0-alpha-13",
            "build-0.4.0-alpha-12",
            "build-0.4.0-alpha-11",
            "build-0.4.0-alpha-10",
            "build-0.4.0-alpha-9",
            "build-0.4.0-alpha-8",
            "build-0.4.0-alpha-7",
            "build-0.4.0-alpha-6",
            "ktor-0.3.3",
            "ktor-0.3.2",
            "ktor-0.3.1",
            "ktor-0.3.0",
            "ktor-0.2.4",
            "ktor-0.2.3",
            "ktor-0.2.2",
            "ktor-0.2.1",
            "ktor-0.2.0",
            "ktor-0.1.8",
            "ktor-0.1.7",
            "ktor-0.1.6",
            "ktor-0.1.5",
            "ktor-0.1.4",
            "ktor-0.1.3",
            "ktor-0.1.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19389.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:51.509352966Z",
      "provider": "osv",
      "references": [
        "https://github.com/ktorio/ktor/pull/1408",
        "https://gist.github.com/JLLeitschuh/6792947ed57d589b08c1cc8b666c7737",
        "https://twitter.com/JLLeitschuh/status/1210256191110230017?s=20"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-19389",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382259,
  "published_at": "2019-12-26T21:15:11.54+00:00"
}