CVE-2026-110848

CVSS 6.0 (medium) · published 2026-10-14

n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the AI workflow builder, which merges workflow connections using node names as object members without checking for reserved keys. Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart.

Weakness: CWE-1321

Source: NVD CVE-2026-110848

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g
• https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-prototype-pollution-via-ai-workflow-builder-connection-merge

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