Security advisory

{
  "id": "e7067e949beca5df003c466bd944d08ac68e6c2bfbaafef6854e7bca0580b284",
  "url": "https://osv.dev/vulnerability/CVE-2020-7658",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-7658",
    "summary": "meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.",
    "evidence": "osv:CVE-2020-7658",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-7658",
      "aliases": [
        "CVE-2020-7658",
        "GHSA-63h2-9cc8-fc7m",
        "PYSEC-2020-239",
        "SNYK-PYTHON-MEINHELD-569140"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mopemope/meinheld",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "311acbc4e7bd38fa3f3d0e158b35cde9ef73f8e5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:meinheld:meinheld:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.1",
            "v1.0.0",
            "v0.6.1",
            "v0.6.0",
            "v0.5.9",
            "v0.5.8",
            "v0.5.7",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5",
            "v0.4.13",
            "v0.4.12",
            "v0.4.11",
            "v0.4.9",
            "v0.4.7",
            "v0.4.6",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7658.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:30.854353369Z",
      "provider": "osv",
      "references": [
        "https://github.com/mopemope/meinheld/blob/master/CHANGES.rst%2C",
        "https://snyk.io/vuln/SNYK-PYTHON-MEINHELD-569140"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-7658",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384391,
  "published_at": "2020-05-22T16:15:10.973+00:00"
}