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Description

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.6 and 11.15.0, there is a denial-of-service attack when rendering gantt charts, if they use the excludes attribute to exclude all dates. mermaid.parse is unaffected, unless you then call the ganttDb.getTasks() (which is called when rendering a diagram). This vulnerability is fixed in 10.9.6 and 11.15.0.

PUBLISHED Reserved 2026-04-17 | Published 2026-05-29 | Updated 2026-05-29 | Assigner GitHub_M




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

Problem types

CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

Product status

>= 11.0.0-alpha.1, < 11.15.0
affected

< 10.9.6
affected

References

github.com/...ermaid/security/advisories/GHSA-6m6c-36f7-fhxh

github.com/...ommit/a59ea56174712ee5430dfd5bc877cb5151f501a6

github.com/...ommit/faafb5d49106dd32c367f3882505f2dd625aa30e

github.com/mermaid-js/mermaid/releases/tag/mermaid@11.15.0

github.com/mermaid-js/mermaid/releases/tag/v10.9.6

cve.org (CVE-2026-41150)

nvd.nist.gov (CVE-2026-41150)

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