CVE-2026-41150: Mermaid Gantt Charts are vulnerable to an Infinite Loop DoS
(updated )
Mermaid v11.14.0 and earlier are vulnerable to a denial-of-service attack when rendering gantt charts, if they use the excludes attribute to exclude all dates.
Example:
gantt
excludes monday,tuesday,wednesday,thursday,friday,saturday,sunday
DoS :2025-01-01, 1d
mermaid.parse is unaffected, unless you then call the ganttDb.getTasks() (which is called when rendering a diagram).
References
- github.com/advisories/GHSA-6m6c-36f7-fhxh
- github.com/mermaid-js/mermaid/commit/a59ea56174712ee5430dfd5bc877cb5151f501a6
- github.com/mermaid-js/mermaid/commit/faafb5d49106dd32c367f3882505f2dd625aa30e
- github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.15.0
- github.com/mermaid-js/mermaid/releases/tag/v10.9.6
- github.com/mermaid-js/mermaid/security/advisories/GHSA-6m6c-36f7-fhxh
- nvd.nist.gov/vuln/detail/CVE-2026-41150
Code Behaviors & Features
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