Use of Blocking Code in Single-threaded, Non-blocking Context Affecting mermaid package, versions >=11.6.0 <11.16.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-MERMAID-18592314
- published8 Aug 2026
- disclosed6 Aug 2026
- creditaloisklink
Introduced: 6 Aug 2026
NewCVE-2026-71439 (opens in a new tab)How to fix?
Upgrade mermaid to version 11.16.1 or higher.
Overview
mermaid is a package for generation of diagrams and flowcharts from text in a similar manner as markdown.
Affected versions of this package are vulnerable to Use of Blocking Code in Single-threaded, Non-blocking Context via the ticks parameter in radar diagrams. An attacker can cause excessive CPU and memory consumption by specifying arbitrarily large values, leading to freezing or termination of the JavaScript process.