CVE Watch23 jul 2026

CVE-2026-41149

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well

CVSS

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Sin CVSS

EPSS

0.4%

p34

KEV

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Exploit Today

0-100

Publicado: 22 may 2026 · Última mod.: 23 jul 2026 · CWE-94

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-08-252026-09-22

Descripción técnica

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits DOM injection that escapes the SVG context. However, <script> tags are stripped, which prevents cross-site scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents the issue by rendering the mermaid diagram in a sandboxed <iframe>.

Referencias oficiales

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