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TI-2026-41414 Aliases CVE-2026-57530GHSA-f8jw-52vm-m867

Milkdown < 7.21.3 Stored XSS via javascript: URL in link href

Priority LOW 23CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Fix Fixed milkdown (Milkdown): 7.21.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Milkdownmilkdownbefore 7.21.37.21.3Patch availableCNA
  • milkdown VendorMilkdown Affected before 7.21.3 Fixed in 7.21.3 Patch available CNA

Remediation

  • Fix · CNA milkdown (Milkdown) Fixed in 7.21.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    milkdown 7.21.3

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-41415 Milkdown < 7.21.3 DOM XSS via innerHTML AssignmentPriority LOW 23
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57530
  2. 2026-10-03 Alias added: GHSA-f8jw-52vm-m867

References

Patch 3

Other 2

  • TI-2026-41415 Milkdown < 7.21.3 DOM XSS via innerHTML Assignment CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences