Prototype pollution vulnerability found in Mermaid's bundled version of DOMPurify
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub.
Summary
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
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | mermaid (npm) | before 10.9.3 | 10.9.3 | Patch available | GHSA-m4gq-x24j-jpmf |
- mermaid (npm) Vendor— Affected before 10.9.3 Fixed in 10.9.3 Patch available GHSA-m4gq-x24j-jpmf
Remediation
- Fix · GHSA-m4gq-x24j-jpmf mermaid (npm) Fixed in 10.9.3 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-m4gq-x24j-jpmf
References
Other 5
- https://github.com/cure53/DOMPurify/security/advisories/GHSA-mmhx-hmjr-r674
- https://github.com/mermaid-js/mermaid/security/advisories/GHSA-m4gq-x24j-jpmf
- https://github.com/mermaid-js/mermaid/commit/6c785c93166c151d27d328ddf68a13d9d65adc00
- https://github.com/mermaid-js/mermaid/commit/92a07ffe40aab2769dd1c3431b4eb5beac282b34
- https://github.com/mermaid-js/mermaid
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences