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      <title>CVE-2026-43979 — Local Deep Research: HTML Injection via Unescaped User Input in PDF Export (`pdf_service.py:_markdown_to_html`)</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-43979</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; LearningCircuit local-deep-research&lt;/p&gt;
&lt;p&gt;Local Deep Research is an AI-powered research assistant for deep, iterative research. Prior to 1.6.0, PDFService._markdown_to_html() constructs an HTML document by interpolating user-controlled values — specifically title (sourced from research.title or research.query) and metadata key-value pairs — directly into an f-string without any HTML escaping. An authenticated attacker can craft a research query containing HTML special characters to inject arbitrary HTML tags into the document processed by WeasyPrint during PDF export. This injection can be chained to trigger a Server-Side Request Forgery (SSRF), bypassing the application&amp;#39;s existing SSRF defenses in ssrf_validator.py. This vulnerability is fixed in 1.6.0.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; LearningCircuit local-deep-research&lt;/p&gt;
&lt;p&gt;Local Deep Research is an AI-powered research assistant for deep, iterative research. Prior to 1.6.0, PDFService._markdown_to_html() constructs an HTML document by interpolating user-controlled values — specifically title (sourced from research.title or research.query) and metadata key-value pairs — directly into an f-string without any HTML escaping. An authenticated attacker can craft a research query containing HTML special characters to inject arbitrary HTML tags into the document processed by WeasyPrint during PDF export. This injection can be chained to trigger a Server-Side Request Forgery (SSRF), bypassing the application&amp;#39;s existing SSRF defenses in ssrf_validator.py. This vulnerability is fixed in 1.6.0.&lt;/p&gt;</content:encoded>
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