Mermaid radar diagrams are vulnerable to DoS

{
  "id": "13c8ae2c6706cf88aada0447cd648535dc67cae998065d9cdc5203a29998c2eb",
  "url": "https://osv.dev/vulnerability/CVE-2026-71439",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Mermaid radar diagrams are vulnerable to DoS",
    "summary": "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.",
    "evidence": "osv:CVE-2026-71439",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-71439",
      "aliases": [
        "CVE-2026-71439",
        "GHSA-rhh3-jpg6-66xh"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mermaid-js/mermaid",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7b2083926dbe3b6280f42376a0d4195b2c72fb8e"
                },
                {
                  "fixed": "7ecca0cd7f1658ef74f4e7e91f925724ef403bbf"
                },
                {
                  "fixed": "59b22fad2b3bb04f87a476c84a8a2b24679e607e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "11.6.0"
                      },
                      {
                        "fixed": "11.16.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "59b22fad2b3bb04f87a476c84a8a2b24679e607e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7ecca0cd7f1658ef74f4e7e91f925724ef403bbf"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "mermaid@11.16.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "mermaid@11.16.0",
            "@mermaid-js/tiny@11.16.0",
            "@mermaid-js/parser@1.2.0",
            "@mermaid-js/layout-elk@0.2.2",
            "@mermaid-js/examples@1.3.0",
            "mermaid@11.15.0",
            "@mermaid-js/mermaid-zenuml@0.2.3",
            "@mermaid-js/parser@1.1.1",
            "@mermaid-js/layout-tidy-tree@0.2.2",
            "mermaid@11.14.0",
            "@mermaid-js/tiny@11.14.0",
            "@mermaid-js/parser@1.1.0",
            "@mermaid-js/examples@1.2.0",
            "mermaid@11.13.0",
            "@mermaid-js/tiny@11.13.0",
            "@mermaid-js/parser@1.0.1",
            "@mermaid-js/layout-elk@0.2.1",
            "@mermaid-js/examples@1.1.0",
            "mermaid@11.12.3",
            "@mermaid-js/tiny@11.12.3",
            "@mermaid-js/parser@1.0.0",
            "@mermaid-js/layout-tidy-tree@0.2.1",
            "mermaid@11.12.2",
            "mermaid@11.12.1",
            "@mermaid-js/tiny@11.12.1",
            "@mermaid-js/parser@0.6.3",
            "mermaid@11.12.0",
            "@mermaid-js/tiny@11.12.0",
            "mermaid@11.11.0",
            "@mermaid-js/tiny@11.11.0",
            "@mermaid-js/layout-tidy-tree@0.2.0",
            "@mermaid-js/layout-elk@0.2.0",
            "mermaid@11.10.1",
            "@mermaid-js/tiny@11.10.1",
            "mermaid@11.10.0",
            "@mermaid-js/tiny@11.10.0",
            "@mermaid-js/mermaid-zenuml@0.2.2",
            "@mermaid-js/layout-elk@0.1.9",
            "mermaid@11.8.1",
            "@mermaid-js/tiny@11.8.1",
            "@mermaid-js/parser@0.6.1",
            "mermaid@11.8.0",
            "@mermaid-js/tiny@11.8.0",
            "@mermaid-js/parser@0.6.0",
            "mermaid@11.7.0",
            "@mermaid-js/tiny@11.7.0",
            "@mermaid-js/parser@0.5.0",
            "@mermaid-js/mermaid-zenuml@0.2.1",
            "@mermaid-js/layout-elk@0.1.8",
            "mermaid@11.6.0",
            "@mermaid-js/parser@0.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71439.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.265036842Z",
      "provider": "osv",
      "references": [
        "https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71439.json",
        "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-rhh3-jpg6-66xh",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71439",
        "https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e",
        "https://github.com/mermaid-js/mermaid/pull/8022"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1322",
          "CWE-606"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71439.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-71439",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490777,
  "published_at": "2026-08-06T20:01:04.423+00:00"
}