Description
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.
INFO
Published Date :
2026-03-05T00:00:00.000Z
Last Modified :
2026-03-12T16:18:40.395Z
Source :
mitre
AFFECTED PRODUCTS
The following products are affected by CVE-2025-69534 vulnerability.
| Vendors | Products |
|---|---|
| Python-markdown |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2025-69534.
