CVE-2026-57530
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
5.4 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-79
Source
NVD
Vendor
Milkdown
Product
milkdown
External References
- https://github.com/Milkdown/milkdown/commit/db1ae721854a0ab2f188b83cf8695702966640f1
- https://github.com/Milkdown/milkdown/pull/2410
- https://github.com/Milkdown/milkdown/releases/tag/v7.21.3
- https://www.npmjs.com/package/@milkdown/components
- https://www.npmjs.com/package/@milkdown/preset-commonmark
- https://www.vulncheck.com/advisories/milkdown-stored-xss-via-javascript-url-in-link-href
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