Kurz gesagt
- CVE-2026-59711 ist eine Schwachstelle (MITTEL (CVSS 6.1)) in showdown.
- Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 0.23%, höher als bei 13.9% aller Schwachstellen.
- Noch keine gepatchte Version bekannt: Herstellerhinweise unter Referenzen verfolgen.
| Package | Affected versions | Patched versions |
|---|
| showdown npm | ≤ 2.1.0
| No fix yet |
Description
showdown contains a cross-site scripting vulnerability in metadata title handling that allows attackers to inject arbitrary HTML and JavaScript. When completeHTMLDocument option is enabled, unescaped less-than and greater-than characters in markdown frontmatter metadata are inserted directly into HTML title tags, enabling attackers to break out of the title context and execute malicious scripts in the rendered page.
NVD description
showdown contains a cross-site scripting vulnerability in metadata title handling that allows attackers to inject arbitrary HTML and JavaScript. When completeHTMLDocument option is enabled, unescaped less-than and greater-than characters in markdown frontmatter metadata are inserted directly into HTML title tags, enabling attackers to break out of the title context and execute malicious scripts in the rendered page.
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