GHSA-6m6c-36f7-fhxh
Mermaid Gantt Charts are vulnerable to an Infinite Loop DoS
Quick fix
GHSA-6m6c-36f7-fhxh — mermaid: upgrade to the fixed version with the command below.
npm install mermaid@11.15.0Details
### Impact
Mermaid v11.14.0 and earlier are vulnerable to a denial-of-service attack when rendering gantt charts, if they use the [`excludes` attribute](https://mermaid.js.org/syntax/gantt.html?#excludes) 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).
### Patches
This has been patched in:
- [v11.15.0](https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.15.0) (see [faafb5d49106dd32c367f3882505f2dd625aa30e](https://github.com/mermaid-js/mermaid/commit/faafb5d49106dd32c367f3882505f2dd625aa30e)) - [v10.9.6](https://github.com/mermaid-js/mermaid/releases/tag/v10.9.6) (see [a59ea56174712ee5430dfd5bc877cb5151f501a6](https://github.com/mermaid-js/mermaid/commit/a59ea56174712ee5430dfd5bc877cb5151f501a6))
### Workarounds
There are no workarounds available without updating to a newer version of mermaid.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/mermaid-js/mermaid/security/advisories/GHSA-6m6c-36f7-fhxh[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-41150[ADVISORY]
- https://github.com/mermaid-js/mermaid/commit/a59ea56174712ee5430dfd5bc877cb5151f501a6[WEB]
- https://github.com/mermaid-js/mermaid/commit/faafb5d49106dd32c367f3882505f2dd625aa30e[WEB]
- https://github.com/mermaid-js/mermaid[PACKAGE]
- https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.15.0[WEB]
- https://github.com/mermaid-js/mermaid/releases/tag/v10.9.6[WEB]