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.

INFO

Published Date :

2026-02-13T16:35:06.252Z

Last Modified :

2026-02-13T16:58:09.961Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2026-26226 vulnerability.

Vendors Products
Lukilabs
  • Beautiful-mermaid
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-26226.

URL Resource
https://github.com/lukilabs/beautiful-mermaid/pull/8 cve-icon cve-icon
https://github.com/lukilabs/beautiful-mermaid/releases/tag/v0.1.3 cve-icon cve-icon
https://neo.projectdiscovery.io/share/cec71dc7-a8eb-417e-b8b4-666644796c1e cve-icon cve-icon
https://www.vulncheck.com/advisories/beautiful-mermaid-svg-attribute-injection cve-icon cve-icon
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