CVE-2026-44899

Περιγραφή

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the Image directive plugin validates the :width: and :height: options with a regex compiled as _num_re = re.compile(r-^\d+(?:\.\d*)?-). When the validated value is not a plain integer, render_block_image() inserts it directly into a style=-width:...;- or style=-height:...;- attribute. Because the value was accepted by the prefix-only regex, any CSS after the leading digits reaches the style= attribute verbatim and without escaping. This vulnerability is fixed in 3.2.1.