CVE Watch7 de nov. de 2026

CVE-2026-121438

Mistune before 3.3.3 contains a denial of service vulnerability in InlineParser.parse_link that allows attackers to cause quadratic CPU grow

CVSS

5.3

Média

EPSS

0.3%

p22

KEV

—

Exploit Today

0-100

Publicado: 3 de nov. de 2026 · Última mod.: 7 de nov. de 2026 · CWE-400

EPSS · 30d

0.3%EPSS · 30 dias0.3%

2026-11-042026-11-07

Descrição técnica

Mistune before 3.3.3 contains a denial of service vulnerability in InlineParser.parse_link that allows attackers to cause quadratic CPU growth by supplying balanced nested brackets. Attackers can submit crafted Markdown with thousands of nested bracket pairs not forming a valid link, triggering repeated _contains_nested_link scans that exhaust CPU in parsing applications.

Referências oficiais

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