PYSEC-2026-2217

En bref

Publiée: 2026-07-08 17:17 UTC
Mise à jour: 2026-07-13 07:15 UTC
CVE: CVE-2026-59929
Alias: GHSA-qfrw-5rxm-mhh2
CVSS_V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src/mistune/renderers/html.py blocks only javascript:, vbscript:, file:, and data: schemes, allowing legacy or chained schemes such as feed:, view-source:, jar:, livescript:, mocha:, ms-its:, mk:, and res: to reach rendered href and src attributes and potentially execute script in affected user agents. This issue is fixed in version 3.3.0.

Paquets affectés

Paquet	Versions
PyPI · mistune	introduced 0, fixed 3.3.0

Références

https://github.com/lepture/mistune/releases/tag/v3.3.0 ADVISORY
https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc FIX
https://github.com/lepture/mistune/security/advisories/GHSA-qfrw-5rxm-mhh2 EVIDENCE

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — PyPA Advisory Database