CVE-2026-84992
CVE-2026-84992 · md-editor-v3: XSS via fenced-code language rendering bypass
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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 or consistently quoting it. Both highlighted and non-highlighted rendering paths reach this return value, while XSSPlugin filters only existing html_block and html_inline tokens before rendering and therefore cannot inspect the renderer-generated HTML. An attacker who can supply Markdown can use crafted fenced-code metadata to execute JavaScript in the application origin when a victim renders it, including as stored cross-site scripting when the host persists the Markdown. This issue is fixed in version 6.5.4
CVSS 6.1 · Moyenne · EPSS 0,3% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
md-editor-v3
- Versions du logiciel
- < 6.5.4: Concernée
Aucun correctif publié
md-editor-v3 npm
- Plages de versions concernées
- SEMVER: < 6.5.4
Mettez à jour vers 6.5.4