github_osv/GHSA-58cw-g322-p94v
Mistune has XSS via unescaped figclass/figwidth in Figure directive
In `src/mistune/directives/image.py`, the `render_figure()` function concatenates `figclass` and `figwidth` options directly into HTML attributes without escaping (lines 152-168).
This allows attribute injection and XSS even when `HTMLRenderer(escape=True)` is used, because these values bypass the inline renderer.
Other attributes in the same file (src, alt, style) are properly escaped; figclass/figwidth were missed.
gitlab/pypi/mistune/CVE-2026-44896
Mistune has XSS via unescaped figclass/figwidth in Figure directive
In `src/mistune/directives/image.py`, the `render_figure()` function concatenates `figclass` and `figwidth` options directly into HTML attributes without escaping (lines 152-168).
This allows attribute injection and XSS even when `HTMLRenderer(escape=True)` is used, because these values bypass the inline renderer.
Other attributes in the same file (src, alt, style) are properly escaped; figclass/figwidth were missed.
pypa/mistune/PYSEC-2026-168
Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and realier, 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.
pysec/PYSEC-2026-168
Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and realier, 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.