CVE Watch26 de out. de 2026

CVE-2026-111766

markdown-it is a Markdown parser. Prior to 14.3.3 and 15.0.3, when the html option or commonmark preset is enabled and the constructs occur

CVSS

3.7

Baixa

EPSS

0.4%

p37

KEV

—

Exploit Today

0-100

Publicado: 19 de out. de 2026 · Última mod.: 26 de out. de 2026 · CWE-400 · CWE-407

EPSS · 30d

0.4%EPSS · 30 dias0.4%

2026-10-202026-11-06

Descrição técnica

markdown-it is a Markdown parser. Prior to 14.3.3 and 15.0.3, when the html option or commonmark preset is enabled and the constructs occur inside a paragraph, attacker-controlled Markdown containing repeated unterminated inline HTML comments, processing instructions, declarations, or CDATA sections reaches src/rules_inline/html_inline.ts. Its HTML_TAG_RE match searches the remaining suffix for the appropriate terminator; when no terminator is present, parsing advances to the next opener and repeats the match over overlapping input, causing quadratic processing and denial of service through event-loop blocking or an unresponsive browser main thread. HTML blocks and the default HTML-disabled configuration are not affected by these payloads. This issue is fixed in versions 14.3.3 and 15.0.3.

Referências oficiais

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