mixmark-io turndown commonmark-rules.js redos

{
  "id": "8e2425d0ce6a4bbf73b3a9b9c5f79524db496b9ee36870bf4c07b28c2c444b29",
  "url": "https://osv.dev/vulnerability/CVE-2025-9670",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mixmark-io turndown commonmark-rules.js redos",
    "summary": "A security flaw has been discovered in mixmark-io turndown up to 7.2.1. This affects an unknown function of the file src/commonmark-rules.js. Performing manipulation results in inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been released to the public and may be exploited.",
    "evidence": "osv:CVE-2025-9670",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-9670",
      "aliases": [
        "CVE-2025-9670"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mixmark-io/turndown",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cc73387fb707e5fb5e1083e94078d08f38f3abc8"
                },
                {
                  "last_affected": "0df0c0506233e0459ba21974f30b9ad3f1feb20f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "7.2.0"
                      },
                      {
                        "last_affected": "7.2.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "7.2.1"
                      },
                      {
                        "last_affected": "7.2.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "7.2.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.2.0",
            "7.2.1",
            "v7.2.1",
            "v7.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-9670.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.672202875Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9670.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-9670",
        "https://vuldb.com/?id.321880",
        "https://vuldb.com/?submit.637911",
        "https://github.com/mixmark-io/turndown/issues/501",
        "https://github.com/mixmark-io/turndown/issues/501#issue-3336342088",
        "https://vuldb.com/?ctiid.321880"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1333",
          "CWE-400"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9670.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-9670",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506279,
  "published_at": "2025-08-29T19:02:08.787+00:00"
}