HIGHpublic-safe

CVE-2026-63671

NVD: MDC is a tool to take regular Markdown and write documents interacting deeply with a Vue component. NVD: Prior to 0.22.1, @nuxtjs/mdc uses parseMarkdown with allowDangerousHtml enabled by default and relies on validateProps, validateProp, and unsafeLinkPrefix to remove executable URLs from untrusted Markdown. NVD: validateProp checks only attributes named href or src, allowing an SVG xlink:href value represented as xLinkHref to retain a javascript: URL that executes in the page origin when selected.

CVSS
8.1 Severity
HIGH EPSS
0.0038 (32) KEV
-

Source-published summary

Possible impact

Source describes XSS risk. Possible impact: This high 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

Patch confirmed by source text; fixed version context: 0.22.1..

Why it matters

Source describes XSS risk. Possible impact: This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for XSS risk.; CVSS 8.1 (HIGH); EPSS percentile 32; not listed in KEV; Patch confirmed by source text; fixed version context: 0.22.1; 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

CVSS HIGHvendor advisory presentrecent updateremediation reference present

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.