CVE-2026-57530 | BDVDB-2026-352289 Detail
Milkdownmilkdown
Description#
Milkdown before 7.21.3 contains a stored cross-site scripting vulnerability in the @milkdown/preset-commonmark and @milkdown/components packages that allows attackers with document write access to execute arbitrary JavaScript in the browser context of any user who opens the document or clicks a rendered link. The parseMarkdown runner stores raw URL values from the remark AST as href mark attributes without URL scheme validation, and the ineffective DOMPurify.sanitize call in edit-view.ts treats the bare URL string as a text node and returns it unchanged, allowing javascript: payloads to pass through the link-tooltip preview component and read-only mode anchor elements unmodified.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.
Weaknesses#
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References#
- https://github.com/Milkdown/milkdown/releases/tag/v7.21.3
- https://github.com/Milkdown/milkdown/pull/2410
- https://github.com/Milkdown/milkdown/commit/db1ae721854a0ab2f188b83cf8695702966640f1
- https://www.npmjs.com/package/@milkdown/preset-commonmark
- https://www.npmjs.com/package/@milkdown/components
- https://www.vulncheck.com/advisories/milkdown-stored-xss-via-javascript-url-in-link-href
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.