{"id":"CVE-2026-71439","aliases":["DEBIAN-CVE-2026-71439","EUVD-2026-54249","GHSA-rhh3-jpg6-66xh","UBUNTU-CVE-2026-71439"],"status":"published","title":"Mermaid radar diagrams are vulnerable to DoS","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.","severity":{"version":"4.0","score":5.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00528,"percentile":0.45188,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1322","CWE-606"],"published":"2026-08-06T20:01:04Z","modified":"2026-10-28T02:30:24Z","fixes":[{"ecosystem":"npm","package":"mermaid","fixed_in":["11.16.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"mermaid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.6.0"},{"fixed":"11.16.1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-mermaid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.11.0+ds+~cs29.13.22-1","8.13.2+ds+~cs30.13.21-1","8.13.2+ds+~cs30.13.21-1.1","8.13.3+ds+~cs26.13.21-1","8.13.3+ds+~cs26.13.21-2","8.13.8+~cs10.4.16-1","8.14.0+ds1+~cs11.4.14-1","8.14.0+~cs11.4.14-1","8.7.0+ds+~cs27.17.17-1","8.7.0+ds+~cs27.17.17-2","8.7.0+ds+~cs27.17.17-2~bpo10+1","8.7.0+ds+~cs27.17.17-3","8.9.1+ds+~cs26.20.25-1","8.9.3+ds+~cs29.13.19-1","9.2.2+~2.0.0-1","9.2.2+~2.0.0-2"]},{"source":"osv","ecosystem":"npm","package":"mermaid","ranges":[{"type":"SEMVER","events":[{"introduced":"11.6.0"},{"fixed":"11.16.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"node-mermaid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.7.0+ds+~cs27.17.17-3","8.13.3+ds+~cs26.13.21-1","8.13.3+ds+~cs26.13.21-2","8.13.8+~cs10.4.16-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"node-mermaid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.2+~2.0.0-1","9.2.2+~2.0.0-2"]}],"products":[{"vendor":"mermaid-js","product":"mermaid"}],"references":[{"url":"https://github.com/mermaid-js/mermaid/security/advisories/GHSA-rhh3-jpg6-66xh","tags":["x_refsource_CONFIRM","advisory","web","report"]},{"url":"https://github.com/mermaid-js/mermaid/pull/8022","tags":["x_refsource_MISC","fix","web","report"]},{"url":"https://github.com/mermaid-js/mermaid/commit/59b22fad2b3bb04f87a476c84a8a2b24679e607e","tags":["x_refsource_MISC","fix","web","report"]},{"url":"https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1","tags":["x_refsource_MISC","web","report"]},{"url":"https://github.com/advisories/GHSA-rhh3-jpg6-66xh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71439.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71439","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-71439","tags":["advisory"]},{"url":"https://github.com/mermaid-js/mermaid","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-71439","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71439","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-71439","title":"Mermaid radar diagrams are vulnerable to DoS","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.","status":"published","published":"2026-08-06T20:01:04.423Z","modified":"2026-08-07T17:09:23.203Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-606","CWE-1322"],"updated_at":"2026-11-02T14:19:49.559463Z"}],"euvd":[{"id":"EUVD-2026-54249","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.","status":"published","published":"2026-08-06T20:01:04Z","modified":"2026-08-07T17:09:23Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T18:02:06.930016Z"}],"ghsa":[{"id":"GHSA-rhh3-jpg6-66xh","title":"Mermaid radar diagrams are vulnerable to DoS","description":"### 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","status":"published","published":"2026-08-06T20:01:07Z","modified":"2026-08-06T20:01:08Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-606","CWE-1322"],"updated_at":"2026-11-02T14:40:57.999375Z"}],"nvd":[{"id":"CVE-2026-71439","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.","status":"published","published":"2026-08-06T22:18:31.023Z","modified":"2026-10-24T15:10:00.19Z","cvss":[{"version":"4.0","score":5.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-606","CWE-1322"],"updated_at":"2026-11-02T14:12:35.386166Z"}],"osv":[{"id":"CVE-2026-71439","title":"Mermaid radar diagrams are vulnerable to DoS","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.","status":"published","published":"2026-08-06T20:01:04.423Z","modified":"2026-10-28T02:30:24.265036842Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-1322","CWE-606"],"updated_at":"2026-11-02T15:45:15.164658Z"},{"id":"DEBIAN-CVE-2026-71439","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.","status":"published","published":"2026-08-06T22:18:31.023Z","modified":"2026-10-25T09:47:31.458267062Z","cvss":[{"version":"4.0","score":5.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:46:02.094661Z"},{"id":"GHSA-rhh3-jpg6-66xh","title":"Mermaid radar diagrams are vulnerable to DoS","description":"### 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","status":"published","published":"2026-08-06T20:01:07Z","modified":"2026-09-10T03:51:14.543369107Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-1322","CWE-606"],"updated_at":"2026-11-02T15:46:55.877614Z"},{"id":"UBUNTU-CVE-2026-71439","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.","status":"published","published":"2026-08-06T22:18:00Z","modified":"2026-10-17T13:00:45.294501247Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T16:57:03.035847Z"}]}}