CVE-2025-69534

{"id": "CVE-2025-69534", "cveTags": [], "metrics": {}, "published": "2026-03-05T15:16:11.243", "references": [{"url": "https://github.com/Python-Markdown/markdown", "source": "cve@mitre.org"}, {"url": "https://github.com/Python-Markdown/markdown/actions/runs/15736122892", "source": "cve@mitre.org"}, {"url": "https://github.com/Python-Markdown/markdown/issues/1534", "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/03/06/4", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions."}], "lastModified": "2026-03-06T21:16:12.480", "sourceIdentifier": "cve@mitre.org"}