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CVE-2026-44896

6.1 MEDIUM

Mistune is a Python Markdown parser with renderers and plugins

Published: 2026-05-26 · Last updated: 2026-06-09

Severity and scoring

CVSS
6.1 MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
CWE-79

Affected products

VendorProduct
mistune_projectmistune

Description

Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer. Version 3.2.1 contains a patch.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-44899 — Mistune is a Python Markdown parser with renderers and plugins (4.7 MEDIUM)
  • CVE-2026-44898 — Mistune is a Python Markdown parser with renderers and plugins (6.1 MEDIUM)
  • CVE-2026-44897 — Mistune is a Python Markdown parser with renderers and plugins (6.1 MEDIUM)
  • CVE-2026-44708 — Mistune is a Python Markdown parser with renderers and plugins (6.1 MEDIUM)

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