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.
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History
Fri, 13 Feb 2026 17:15:00 +0000
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Fri, 13 Feb 2026 16:45:00 +0000
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| 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. | |
| Title | beautiful-mermaid < 0.1.3 SVG Attribute Injection | |
| Weaknesses | CWE-79 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-02-13T16:58:09.961Z
Reserved: 2026-02-11T20:08:07.945Z
Link: CVE-2026-26226
Updated: 2026-02-13T16:58:06.221Z
Status : Received
Published: 2026-02-13T17:16:14.073
Modified: 2026-02-13T17:16:14.073
Link: CVE-2026-26226
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OpenCVE Enrichment
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