PYSEC-2026-2210

En bref

Publiée: 2026-07-08 17:17 UTC
Mise à jour: 2026-07-13 07:15 UTC
CVE: CVE-2026-59922
Alias: GHSA-c8j7-8cv4-2xmq
CVSS_V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a run of closed tilde, equals-sign, or caret marker pairs around a character causes quadratic work in src/mistune/plugins/formatting.py when the strikethrough, mark, or insert plugin scans for matching markers from each possible start position, allowing denial of service through CPU exhaustion. 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/96d0f57f8fe9eeb06bb4cff521962a27d7c402e7 FIX
https://github.com/lepture/mistune/security/advisories/GHSA-c8j7-8cv4-2xmq EVIDENCE

Sources

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