Vuln Signal Radar
public-safe defensive signal
Agent JSON
MEDIUMpublic-safe

CVE-2026-57530

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

CVSS
5.1 Severity
MEDIUM EPSS
0.0018 (8) KEV
-

Source-published summary

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

Possible impact

Source describes XSS risk. Possible impact: This medium severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for XSS risk.

Affected context

Affected product or version requires source confirmation.

Remediation / advisory

Remediation reference present; patch status requires confirmation in the linked advisory.

Why it matters

Source describes XSS risk. Possible impact: This medium severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for XSS risk.; CVSS 5.1 (MEDIUM); EPSS percentile 8; not listed in KEV; Remediation reference present; patch status requires confirmation in the linked advisory; sources: NVD, OSV.

What to verify

Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.

Exposure hint

exposure unknown

Impact tags

XSS risk

Urgency reasons

vendor advisory presentrecent update

Source-derived note

Summary derived from NVD / OSV description; unsafe procedural detail is not shown.

Redaction metadata

source summary used
True
fallback summary used
False
unsafe procedural detail present
false
raw source displayed
false
public summary redacted
true

Remediation handoff

Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.

Handoff JSON Handoff Markdown Safe Codex prompt

Safety note

This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.

Official references