CVE-2026-41150
Medium
Description
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.6 and 11.15.0, there is a denial-of-service attack when rendering gantt charts, if they use the excludes attribute to exclude all dates. mermaid.parse is unaffected, unless you then call the ganttDb.getTasks() (which is called when rendering a diagram). This vulnerability is fixed in 10.9.6 and 11.15.0.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Mermaid
PublishedMay 29, 2026
First seenMay 29, 2026
Weakness typeCWE-835CWE-835
How to fix
Update
- mermaid_project mermaid10.9.6, 11.15.0 or later
- mermaid11.15.0, 10.9.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mermaid_project mermaid | v < 10.9.6, 11.0.0 ≤ v < 11.15.0 | 10.9.6, 11.15.0 |
| mermaidnpm | 11.0.0-alpha.1 ≤ v < 11.15.0, v < 10.9.6 | 11.15.0, 10.9.6 |
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