{"id":"CVE-2026-71439","aliases":["GHSA-rhh3-jpg6-66xh"],"url":"https://o3.security/vulnerability/CVE-2026-71439","summary":"Mermaid radar diagrams are vulnerable to DoS","details":"### Impact\n\nMermaid 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.\n\n#### Proof-of-concept\n\n```txt\nradar-beta\n  axis a, b\n  curve c {1, 1}\n  ticks 1000000000\n```\n\n### Patches\n\n_Has the problem been patched? What versions should users upgrade to?_\n\nThis 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)\n\n### Workarounds\n\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nThere are no known workarounds without updating to a patched version of mermaid.\n\n### References\n\n_Are there any links users can visit to find out more?_\n\n- https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e\n- https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1","published":"2026-08-06T20:01:04.423Z","modified":"2026-10-28T02:30:24.265036842Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"mermaid","fixedVersion":"11.16.1"}],"fix":{"url":"https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e","label":"mermaid-js/mermaid@59b22fa"},"references":[{"type":"WEB","url":"https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71439.json"},{"type":"ADVISORY","url":"https://github.com/mermaid-js/mermaid/security/advisories/GHSA-rhh3-jpg6-66xh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71439"},{"type":"FIX","url":"https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e"},{"type":"FIX","url":"https://github.com/mermaid-js/mermaid/pull/8022"},{"type":"PACKAGE","url":"https://github.com/mermaid-js/mermaid"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:24.265036842Z"}}