Security advisory

{
  "id": "1b6878d0a4f5ad72e7a147d1c241c852b6b597b4f237765b46293651bf3957d8",
  "url": "https://osv.dev/vulnerability/CVE-2020-37280",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-37280",
    "summary": "cbor-sync through 1.0.4 contains a resource exhaustion vulnerability in CBOR.decode that trusts declared array and map lengths without checking remaining input. Remote attackers can supply a tiny crafted CBOR payload declaring huge lengths to drive billions of iterations, exhausting CPU and process memory.",
    "evidence": "osv:CVE-2020-37280",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-37280",
      "aliases": [
        "CVE-2020-37280"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pelioniot/cbor-sync",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "35fdf44ce469ec34b7985f8463c806876fdb8d31"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.0.4"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.4",
            "v1.0.3",
            "v1.0.0",
            "v0.0.4",
            "v0.0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-37280.json"
          }
        }
      ],
      "modified": "2026-10-24T02:30:43.110112162Z",
      "provider": "osv",
      "references": [
        "https://www.vulncheck.com/advisories/cbor-sync-through-1.0.4-memory-exhaustion-via-unchecked-cbor-array-lengths",
        "https://github.com/PelionIoT/cbor-sync/issues/6",
        "https://github.com/PelionIoT/cbor-sync/pull/4",
        "https://github.com/PelionIoT/cbor-sync"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-37280",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 428156,
  "published_at": "2026-10-12T21:17:05.733+00:00"
}