CVE-2026-59930

Description

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the toc plugin and TableOfContents directive generate heading IDs as predictable toc_N values without slugifying the heading text, allowing attacker-controlled id="toc_N" content to collide with generated anchors and redirect same-page navigation, CSS selectors, or JavaScript handlers. 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-345
• CWE-1284

Références

• https://github.com/lepture/mistune/commit/c4093c4742ed0d10d9332fb8edb455869b7b581b Patch
• https://github.com/lepture/mistune/releases/tag/v3.3.0 Release Notes
• https://github.com/lepture/mistune/security/advisories/GHSA-2hm2-hc3v-44h9 ExploitThird Party Advisory
• https://github.com/lepture/mistune/security/advisories/GHSA-2hm2-hc3v-44h9 ExploitThird Party Advisory

Ailleurs

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