Security advisory

{
  "id": "83b2ca06490d3be529f7f0353e1cb31bd606f2f208b813eb4f6755a16d542c28",
  "url": "https://osv.dev/vulnerability/CVE-2020-9840",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-9840",
    "summary": "In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.",
    "evidence": "osv:CVE-2020-9840",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-9840",
      "aliases": [
        "CVE-2020-9840",
        "GHSA-xhhr-p2r9-jmm7"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apple/swift-nio-extras",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "e0e76733600a2806b3dc4feae8cfebace858c1a2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apple:nioextras:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.4.0",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.0",
            "1.1.0",
            "1.0.0",
            "1.0.0-convergence.2",
            "1.0.0-convergence.1",
            "0.1.3",
            "0.1.2",
            "0.1.1",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-9840.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:32.692073709Z",
      "provider": "osv",
      "references": [
        "https://github.com/apple/swift-nio-extras/security/advisories/GHSA-xhhr-p2r9-jmm7"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-9840",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384408,
  "published_at": "2020-05-11T20:15:12.51+00:00"
}