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CVE-2026-74234 is a cross-site scripting vulnerability in Legora versions prior to 2026-08-14. The flaw is triggered when attacker-controlled Mermaid content is prefixed with a gray-matter JavaScript front-matter directive. During processing, the front-matter parser invokes eval() on the supplied directive before SVG sanitization is applied, allowing untrusted input to execute as JavaScript in the victim's browser. The issue affects rendering flows that process influenced Mermaid diagram content and results in script execution within the application's browser context.
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No public exploit code observed for this vulnerability.
7 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.