CVE-2026-59928

Description

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/block_parser.py and the ref_links environment dictionary handling, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0.

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Produits concernés

• lepture mistune
• Mistune project mistune

Scores CVSS

Faiblesses (CWE)

• CWE-407
• CWE-1333

Références

• https://github.com/lepture/mistune/commit/2b04d7ba341c16ac78fe82d3076bdd5c3de87c69 Patch
• https://github.com/lepture/mistune/releases/tag/v3.3.0 Release Notes
• https://github.com/lepture/mistune/security/advisories/GHSA-ffq3-xpv3-j92q ExploitThird Party Advisory
• https://github.com/lepture/mistune/security/advisories/GHSA-ffq3-xpv3-j92q ExploitThird Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories