Mermaid radar diagrams are vulnerable to DoS
### Impact Mermaid radar diagrams allow arbitrary large values for `ticks`, which can cause high CPU usage, freezing the webpage/JavaScript process for long periods of time, until the process is eventually killed due to OOM/running out of memory. #### Proof-of-concept ```txt radar-beta axis a, b curve c {1, 1} ticks 1000000000 ``` ### Patches _Has the problem been patched? What versions should users upgrade to?_ This problem has been patched by https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e, which was released in [Mermaid v11.16.1](https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1) ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ There are no known workarounds without updating to a patched version of mermaid. ### References _Are there any links users can visit to find out more?_ - https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e - https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-71439US | — | — | ||
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 la… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/mermaid-js/mermaidPACKAGE
- https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607eWEB
- https://github.com/mermaid-js/mermaid/pull/8022WEB
- https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1WEB
- https://github.com/mermaid-js/mermaid/security/advisories/GHSA-rhh3-jpg6-66xhWEB
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