Security advisory

{
  "id": "f6c746e4b9d87d52959b0e970a2dc2dd4686fc956cdb15e57ae91dd05db03542",
  "url": "https://osv.dev/vulnerability/CVE-2022-34749",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2022-34749",
    "summary": "In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.",
    "evidence": "osv:CVE-2022-34749",
    "products": [],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-34749",
      "aliases": [
        "CVE-2022-34749",
        "GHSA-fw3v-x4f2-v673",
        "PYSEC-2022-237"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/lepture/mistune",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.0.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0rc1",
            "v2.0.0a6",
            "v2.0.0a5",
            "v2.0.0a4",
            "v2.0.0a3",
            "v2.0.0a2",
            "v2.0.0a1",
            "v0.8.4",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8",
            "v0.7.4",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7",
            "v0.6",
            "v0.5.1",
            "v0.5",
            "v0.4.1",
            "v0.4",
            "v0.3.1",
            "v0.3.0",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-34749.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.410597123Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/34xxx/CVE-2022-34749.json",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-34749",
        "https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2",
        "https://github.com/lepture/mistune/releases"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/34xxx/CVE-2022-34749.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-34749",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 505580,
  "published_at": "2022-07-25T00:00:00+00:00"
}