CVE-2026-26226
beautiful-mermaid < 0.1.3 SVG Attribute Injection
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | lukilabs |
| Product | beautiful-mermaid |
| Published | Feb 13, 2026 |
| Last Updated | Jul 14, 2026 |
Stay Ahead of the Next One
Get instant alerts for lukilabs beautiful-mermaid
Be the first to know when new unknown vulnerabilities affecting lukilabs beautiful-mermaid are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
lukilabs / beautiful-mermaid
0 < 0.1.3
References
github.com: https://github.com/lukilabs/beautiful-mermaid/releases/tag/v0.1.3 github.com: https://github.com/lukilabs/beautiful-mermaid/pull/8 neo.projectdiscovery.io: https://neo.projectdiscovery.io/share/cec71dc7-a8eb-417e-b8b4-666644796c1e vulncheck.com: https://www.vulncheck.com/advisories/beautiful-mermaid-svg-attribute-injection
Credits
Neo by ProjectDiscovery (https://neo.projectdiscovery.io)