{"id":"CVE-2025-46656","details":"python-markdownify (aka markdownify) before 0.14.1 allows large headline prefixes such as \u003ch9999999\u003e in addition to \u003ch1\u003e through \u003ch6\u003e. This causes memory consumption.","aliases":["GHSA-7mpr-5m44-h73r","PYSEC-2026-1604"],"modified":"2026-08-12T03:51:12.217358869Z","published":"2025-04-26T00:00:00Z","database_specific":{"cna_assigner":"mitre","cwe_ids":["CWE-1284"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46656.json"},"references":[{"type":"WEB","url":"https://github.com/matthewwithanm/python-markdownify/compare/0.14.0...0.14.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46656.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46656"},{"type":"REPORT","url":"https://github.com/matthewwithanm/python-markdownify/issues/143"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/matthewwithanm/python-markdownify","events":[{"introduced":"0"},{"fixed":"8f70e3952f7f8132777e60ed098f8974e51f7cbd"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.14.1"}],"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:matthewwithanm:markdownify:*:*:*:*:*:python:*:*"}}],"versions":["0.14.0","0.13.1","0.13.0","0.12.1","0.12.0","0.11.6","0.11.5","0.11.4","0.11.3","0.11.2","0.11.1","0.11.0","0.10.3","0.10.2","0.10.1","0.10.0","0.9.4","0.9.3","0.9.2","0.9.1","0.9.0","0.8.1","0.8.0","0.7.4","0.7.3","0.7.2","0.7.1","0.7.0","0.6.6","0.6.5","0.6.4","0.6.3","0.6.2","0.6.1","0.5.3","0.5.2","0.5.0","0.4.0","0.3.0","0.2.0","0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-46656.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}