PT-2026-56013 · Showdown · Showdown

Vc-Smoore · Publicado 2026-07-06 · Atualizado 2026-07-06 · CVE-2026-59711

Mitre

CVSS v3.1

6.1

Média

Vetor base

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

Correção

XSS

Enumeração de Fraquezas

CWE-79

Identificadores relacionados

CVE-2026-59711

Produtos afetados

Showdown

Referências · 4

• https://github.com/showdownjs/showdown/issues/1047 · Nota
• https://github.com/showdownjs/showdown · Nota
• https://vulncheck.com/advisories/showdown-cross-site-scripting-via-unescaped-metadata-title-in-completehtmldocument · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-59711 · Nota de Segurança