https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Fri, 02 Oct 2026 11:24:57 +0000 https://vulnerability.circl.lu/vuln/cve-2026-44898 <p><strong>Affected:</strong> lepture mistune</p> <p>Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_toc_ul() builds a &lt;ul&gt; table-of-contents tree from a list of (level, id, text) tuples. Both the id value (used as href=&#34;#&lt;id&gt;&#34;) and the text value (used as the visible link label) are inserted into &lt;a&gt; tags via a plain Python format string — with no HTML escaping applied to either value. When heading IDs are derived from user-supplied heading text (the standard use-case for readable slug anchors), an attacker can craft a heading whose text breaks out of the href=&#34;#...&#34; attribute context, injecting arbitrary HTML tags including &lt;script&gt; blocks directly into the rendered TOC. This vulnerability is fixed in 3.2.1.</p> <p><strong>Affected:</strong> lepture mistune</p> <p>Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_toc_ul() builds a &lt;ul&gt; table-of-contents tree from a list of (level, id, text) tuples. Both the id value (used as href=&#34;#&lt;id&gt;&#34;) and the text value (used as the visible link label) are inserted into &lt;a&gt; tags via a plain Python format string — with no HTML escaping applied to either value. When heading IDs are derived from user-supplied heading text (the standard use-case for readable slug anchors), an attacker can craft a heading whose text breaks out of the href=&#34;#...&#34; attribute context, injecting arbitrary HTML tags including &lt;script&gt; blocks directly into the rendered TOC. This vulnerability is fixed in 3.2.1.</p> https://vulnerability.circl.lu/vuln/cve-2026-44898