CVE-2025-69534 is a Denial of Service vulnerability in Python-Markdown version 3.8, allowing remote, unauthenticated attackers to crash applications by processing specially crafted, malformed HTML-like sequences. This affects any system rendering untrusted Markdown, such as web applications, documentation systems, or CI/CD pipelines. The vulnerability enables remote DoS and potential information disclosure due to an unhandled exception during parsing. There is currently no evidence of active exploitation, nor are public exploit modules available. Community and media attention are minimal, with no indication of widespread discussion or exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.8CPE matchmatch criteria | cpe:2.3:a:python-markdown:markdown:3.8:*:*:*:*:python:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.