# CVE-2021-43861: node-mermaid: Mermaid is a Javascript based diagramming and charting tool that uses Markdown-inspired text definitions and a render...

CVE-2021-43861 is fixed in node-mermaid on 1 platform by DEBIAN-CVE-2021-43861 (version 8.13.8+~cs10.4.16-1), released December 30, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-43861
- Priority: Routine
- CVSS: 5.4 (medium)
- EPSS: 0.0094
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2021

## Description

Mermaid is a Javascript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. Prior to version 8.13.8, malicious diagrams can run javascript code at diagram readers' machines. Users should upgrade to version 8.13.8 to receive a patch. There are no known workarounds aside from upgrading.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-mermaid Debian 14 | 8.13.8+~cs10.4.16-1 | [DEBIAN-CVE-2021-43861](https://patchblox.com/security/data/fix/linux/debian-cve-2021-43861.md) | Dec 30, 2021 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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