CVE-2026-84992
- Source
- https://cve.org/CVERecord?id=CVE-2026-84992
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84992.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-84992
- Aliases
- Published
- 2026-09-18T17:10:08Z
- Modified
- 2026-09-19T03:47:36Z
- Severity
-
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- md-editor-v3: XSS via fenced-code language rendering bypass
- Details
-
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
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-79" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84992.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84992.json
- https://github.com/imzbf/md-editor-v3/commit/2c07360420e74087f5bc63032ab155d93e0a0b10
- https://github.com/imzbf/md-editor-v3/releases/tag/v6.5.4
- https://github.com/imzbf/md-editor-v3/security/advisories/GHSA-3rm2-h79c-8qw6
- https://nvd.nist.gov/vuln/detail/CVE-2026-84992