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Mermaid Gantt Charts are vulnerable to an Infinite Loop DoS

CVSS 4.0 5.3 MEDIUMEUVD CVSS 4.0 5.3 CVSS 4.0 · [email protected] · Secondary 5.3 MEDIUMCVSS 3.1 · [email protected] · Primary 5.3 MEDIUMCVSS_V3 CVSS_V4 Publisher rating MODERATEFixed by mermaid 11.15.0Fixed by mermaid 10.9.6KEV status unknown

cve-program · CVE-2026-41150

Published

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.

Read the publisher's advisory

euvd · EUVD-2026-33325

Published

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.

Read the publisher's advisory

nvd · CVE-2026-41150

Published

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.

Read the publisher's advisory

osv · GHSA-6m6c-36f7-fhxh

Published

### 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.

Read the publisher's advisory

Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

13 saved versions

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15 Nov 2026 12:03:08 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

13 Nov 2026 11:57:59 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

11 Nov 2026 10:58:36 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

9 Nov 2026 10:05:36 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

7 Nov 2026 09:27:55 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

5 Nov 2026 08:55:15 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

3 Nov 2026 07:59:50 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

1 Nov 2026 07:05:47 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

30 Oct 2026 06:49:52 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

28 Oct 2026 05:06:52 UTC

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 excl…

euvd · EUVD-2026-33325 · Published

25 Oct 2026 09:17:30 UTC

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 excl…

nvd · CVE-2026-41150 · Published

24 Oct 2026 13:17:17 UTC

Mermaid Gantt Charts are vulnerable to an Infinite Loop DoS

osv · GHSA-6m6c-36f7-fhxh · Published

23 Oct 2026 15:48:27 UTC

Mermaid Gantt Charts are vulnerable to an Infinite Loop DoS

cve-program · CVE-2026-41150 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 12:11 UTC · 256 of 275 readable · 252 fully read · documentation 469/469 current