GHSA-3RM2-H79C-8QW6 md-editor-v3: XSS via fenced-code language rendering bypass

Summary MdPreview interpolates a fenced-code language into HTML attributes without escaping it. A crafted info string therefore executes JavaScript even when the shipped XSSPlugin is enabled. Details useMarkdownIt packages/MdEditor/layouts/Content/composition/useMarkdownIt.ts:206 registers a...

CVE-2026-84992

md-editor-v3 , a Markdown editor for Vue 3, contains an XSS vulnerability in MdPreview's useMarkdownIt() highlight callback (useMarkdownIt.ts:206). The fenced-code language value is interpolated into class="language-${language}" and an unquoted language=${language} HTML attribute without escaping...

CVE-2026-84992 md-editor-v3: XSS via fenced-code language rendering bypass

md-editor-v3 is a Markdown editor for Vue 3 developed in JSX and TypeScript. Prior to 6.5.4, MdPreview's useMarkdownIt highlight callback in packages/MdEditor/layouts/Content/composition/useMarkdownIt.ts inserts a fenced-code language value into class and language HTML attributes without escaping...