Uncontrolled Resource Consumption in markdown-it

{
  "id": "e0148eff3e755152d14affa9f2fad67e8809a2645b116592d9c56c4cc9c3f35c",
  "url": "https://osv.dev/vulnerability/CVE-2022-21670",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Uncontrolled Resource Consumption in markdown-it",
    "summary": "markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.",
    "evidence": "osv:CVE-2022-21670",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2022-21670",
      "aliases": [
        "CVE-2022-21670",
        "GHSA-6vfc-qv3f-vr6c"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/markdown-it/markdown-it",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ffc49ab46b5b751cd2be0aabb146f2ef84986101"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:markdown-it_project:markdown-it:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "12.3.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ffc49ab46b5b751cd2be0aabb146f2ef84986101"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "12.3.1",
            "12.3.0",
            "12.2.0",
            "12.1.0",
            "12.0.6",
            "12.0.5",
            "12.0.4",
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            "8.4.2",
            "8.4.1",
            "8.4.0",
            "8.3.2",
            "8.3.1",
            "8.3.0",
            "8.2.2",
            "8.2.1",
            "8.2.0",
            "8.1.0",
            "8.0.1",
            "8.0.0",
            "7.0.1",
            "7.0.0",
            "6.1.1",
            "6.1.0",
            "6.0.5",
            "6.0.4",
            "6.0.3",
            "6.0.2",
            "6.0.1",
            "6.0.0",
            "5.1.0",
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            "5.0.1",
            "5.0.0",
            "4.4.0",
            "4.3.1",
            "4.3.0",
            "4.2.2",
            "4.2.1",
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            "4.1.0",
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            "4.0.0",
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            "3.0.5",
            "3.0.4",
            "3.0.3",
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            "3.0.1",
            "3.0.0",
            "2.2.1",
            "2.2.0",
            "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-2022-21670.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.193875168Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21670.json",
        "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-21670",
        "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-400"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21670.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-21670",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492790,
  "published_at": "2022-01-10T20:40:10+00:00"
}