CVEvulnerability

CVE-2026-59930

4.3 MEDIUM Published 2026-07-08 Modified 2026-10-25 Official page ↗
Status
Analyzed
Published
2026-07-08
Last modified
2026-10-25
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weaknesses
CWE-1284, CWE-345

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.

Affected configurations

• mistune project mistune (< 3.3.0)

Related

Weakness · CWE (2)

  • CWE-1284 Improper Validation of Specified Quantity in Input weakness
  • CWE-345 Insufficient Verification of Data Authenticity weakness

References