GHSA-5wmx-573v-2qwq

Suggest an improvement
Source
https://github.com/advisories/GHSA-5wmx-573v-2qwq
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-5wmx-573v-2qwq/GHSA-5wmx-573v-2qwq.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-5wmx-573v-2qwq
Aliases
  • CVE-2025-69534
Downstream
Published
2026-03-05T15:30:36Z
Modified
2026-03-06T23:01:56.545306Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
Python-Markdown has an Uncaught Exception
Details

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.

Database specific 
{
    "github_reviewed_at": "2026-03-05T21:59:47Z",
    "nvd_published_at": "2026-03-05T15:16:11Z",
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-248"
    ],
    "github_reviewed": true
}
References

Affected packages

PyPI / markdown

Package

Name
markdown
View open source insights on deps.dev
Purl
pkg:pypi/markdown

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.8.1

Affected versions

1.*
1.7
2.*
2.0
2.0.1
2.0.2
2.0.3
2.1.0
2.1.1
2.2.0
2.2.1
2.3
2.3.1
2.4
2.4.1
2.5
2.5.1
2.5.2
2.6
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.6
2.6.7
2.6.8
2.6.9
2.6.10
2.6.11
3.*
3.0
3.0.1
3.1
3.1.1
3.2
3.2.1
3.2.2
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.5
3.5.1
3.5.2
3.6
3.7
3.8

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-5wmx-573v-2qwq/GHSA-5wmx-573v-2qwq.json"