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CVE WatchJul 14, 2026

CVE-2026-26226

beautiful-mermaid versions prior to 0.1.3 contain an SVG attribute injection issue that can lead to cross-site scripting (XSS) when renderin

CVSS

—

No CVSS

EPSS

0.5%

p40

KEV

—

Exploit Today

12

0-100

Published: Feb 13, 2026 · Last modified: Jul 14, 2026 · CWE-79

EPSS · 30d
0.5%EPSS · 30 days0.5%
2026-06-302026-07-17
Technical description

beautiful-mermaid versions prior to 0.1.3 contain an SVG attribute injection issue that can lead to cross-site scripting (XSS) when rendering attacker-controlled Mermaid diagrams. User-controlled values from Mermaid style and classDef directives are interpolated into SVG attribute values without proper escaping, allowing crafted input to break out of an attribute context and inject arbitrary SVG elements/attributes into the rendered output. When the generated SVG is embedded in a web page, this can result in script execution in the context of the embedding origin.

Official references
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