CVE-2026-71438

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

CVE-2026-71438: Improperly Controlled Modification of Object Prototype Attributes

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into Mermaid's interna...

PT-2026-68955

Summary Mermaid's configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge the caller-supplied configuration object into Mermaid's internal config using the assignWithDepth deep-merge helper that is vulnerable to prototype pollution. Because these APIs...

PT-2026-68806

Name of the Vulnerable Software and Affected Versions Mermaid versions prior to 10.9.8 Mermaid versions prior to 11.16.1 Description Configuration setters mermaid.initialize, mermaidAPI.setConfig, and mermaidAPI.updateSiteConfig merge caller-supplied configuration into the internal config using t...