Security advisory

{
  "id": "d5ccae0d67074a69dc443a3625d12ed62b8e8d4e895f3902d0f77531a7ad6ecc",
  "url": "https://osv.dev/vulnerability/CVE-2021-45293",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-45293",
    "summary": "A Denial of Service vulnerability exists in Binaryen 103 due to an Invalid memory address dereference in wasm::WasmBinaryBuilder::visitLet.",
    "evidence": "osv:CVE-2021-45293",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-45293",
      "aliases": [
        "CVE-2021-45293"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/webassembly/binaryen",
              "type": "GIT",
              "events": [
                {
                  "introduced": "98b1ff3f7ba752dcb0d7b435a97697108c5fe2e9"
                },
                {
                  "last_affected": "98b1ff3f7ba752dcb0d7b435a97697108c5fe2e9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:webassembly:binaryen:103:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "103"
                      },
                      {
                        "last_affected": "103"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "103",
            "version_103"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45293.json"
          }
        }
      ],
      "modified": "2026-10-24T10:47:39.298326157Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UKGCHPS7UAIOOBGSXDJAUFE5CROTTF6J/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YCWLB4PWYQO55F7IGNC7KUYN2MFZE3JP/",
        "https://github.com/WebAssembly/binaryen/issues/4384"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  },
                  {
                    "introduced": "35"
                  },
                  {
                    "last_affected": "35"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-45293",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441435,
  "published_at": "2021-12-21T18:15:08.333+00:00"
}