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      <title>CVE-2026-8445 — justhtml before 1.12.0 Sanitizer Bypass via Markdown</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-8445</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; EmilStenstrom justhtml&lt;/p&gt;
&lt;p&gt;justhtml versions &amp;lt;= 1.11.0 (fixed in 1.12.0) do not sufficiently escape HTML-significant characters (angle brackets) in text nodes when converting a parsed document to Markdown via to_markdown(). While a small set of Markdown metacharacters are escaped, characters such as &amp;lt; and &amp;gt; are preserved, so untrusted input that is safe in to_html() — including entity-decoded text (e.g. &amp;amp;lt;script&amp;amp;gt;) or text from RCDATA/RAWTEXT-parsed elements like &amp;lt;title&amp;gt;, &amp;lt;textarea&amp;gt;, &amp;lt;noscript&amp;gt;, and &amp;lt;plaintext&amp;gt; — can be emitted as raw HTML in the Markdown output, enabling a sanitizer bypass and potential cross-site scripting when that output is rendered.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; EmilStenstrom justhtml&lt;/p&gt;
&lt;p&gt;justhtml versions &amp;lt;= 1.11.0 (fixed in 1.12.0) do not sufficiently escape HTML-significant characters (angle brackets) in text nodes when converting a parsed document to Markdown via to_markdown(). While a small set of Markdown metacharacters are escaped, characters such as &amp;lt; and &amp;gt; are preserved, so untrusted input that is safe in to_html() — including entity-decoded text (e.g. &amp;amp;lt;script&amp;amp;gt;) or text from RCDATA/RAWTEXT-parsed elements like &amp;lt;title&amp;gt;, &amp;lt;textarea&amp;gt;, &amp;lt;noscript&amp;gt;, and &amp;lt;plaintext&amp;gt; — can be emitted as raw HTML in the Markdown output, enabling a sanitizer bypass and potential cross-site scripting when that output is rendered.&lt;/p&gt;</content:encoded>
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