CVEvulnerability

CVE-2026-59922

7.5 HIGH 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])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-1333, CWE-407

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.

Affected configurations

• mistune project mistune (< 3.3.0)

Related

Weakness · CWE (2)

  • CWE-1333 Inefficient Regular Expression Complexity weakness
  • CWE-407 Inefficient Algorithmic Complexity weakness

References