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mermaid-js/mermaid · Security

Prototype pollution vulnerability found in Mermaid's bundled version of DOMPurify

GHSA ID
GHSA-m4gq-x24j-jpmf
Severity
high
Published
Updated
CVSS
7 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
CVSS v3
7 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

Description

The following bundled files within the Mermaid NPM package contain a bundled version of DOMPurify that is vulnerable to https://github.com/cure53/DOMPurify/security/advisories/GHSA-mmhx-hmjr-r674, potentially resulting in an XSS attack.

This affects the built:

  • dist/mermaid.min.js
  • dist/mermaid.js
  • dist/mermaid.esm.mjs
  • dist/mermaid.esm.min.mjs

This will also affect users that use the above files via a CDN link, e.g. https://cdn.jsdelivr.net/npm/[email protected]/dist/mermaid.min.js

Users that use the default NPM export of mermaid, e.g. import mermaid from 'mermaid', or the dist/mermaid.core.mjs file, do not use this bundled version of DOMPurify, and can easily update using their package manager with something like npm audit fix.

Patches

  • develop branch: 6c785c93166c151d27d328ddf68a13d9d65adc00
  • backport to v10: 92a07ffe40aab2769dd1c3431b4eb5beac282b34

CWEs

  • CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
  • CWE-1395 · Dependency on Vulnerable Third-Party Component

References