Security advisory

{
  "id": "5680c17b543ef5b452f942e2e3e541abb0df3f7e7d9fd4b468920decbec22472",
  "url": "https://osv.dev/vulnerability/CVE-2020-36049",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-36049",
    "summary": "socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.",
    "evidence": "osv:CVE-2020-36049",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-36049",
      "aliases": [
        "CVE-2020-36049",
        "GHSA-xfhh-g9f5-x4m4"
      ],
      "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/socketio/socket.io-parser",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a8130ce3a9682498bf986a0c3e4a53f9cf2ef965"
                },
                {
                  "fixed": "dcb942d24db97162ad16a67c2a0cf30875342d55"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:socket:socket.io-parser:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "dcb942d24db97162ad16a67c2a0cf30875342d55"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.3.0",
            "3.4.0",
            "3.2.0",
            "3.1.3",
            "3.1.2",
            "3.1.1",
            "3.1.0",
            "3.0.0",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.6",
            "2.2.5",
            "2.2.4",
            "2.2.3",
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "2.1.5",
            "2.1.4",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-36049.json"
          }
        }
      ],
      "modified": "2026-10-24T10:48:38.072746724Z",
      "provider": "osv",
      "references": [
        "https://github.com/bcaller/kill-engine-io",
        "https://github.com/socketio/socket.io-parser/commit/dcb942d24db97162ad16a67c2a0cf30875342d55",
        "https://blog.caller.xyz/socketio-engineio-dos/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:socket:socket.io-parser:*:*:*:*:*:node.js:*:*"
            ],
            "vendor_product": "socket:socket.io-parser",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.4.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-36049",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441615,
  "published_at": "2021-01-08T00:15:11.187+00:00"
}