CVE-2026-71439
Medium
Description
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 11.6.0 until 11.16.1, Mermaid Radar Diagrams allow arbitrary large values for the ticks parameter, which can cause high CPU usage and freeze the rendering webpage or JavaScript process for long periods of time, potentially until the process is killed from memory exhaustion. This issue is fixed in version 11.16.1.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Mermaid
PublishedAug 6, 2026
First seenAug 6, 2026
Weakness typeCWE-606CWE-606CWE-1322CWE-1322
How to fix
Update
- mermaid11.16.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mermaidnpm | 11.6.0 ≤ v < 11.16.1 | 11.16.1 |
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