CVE-2026-110848
n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1321 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Oct 14, 2026 |
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Affected Versions
n8n-io / n8n
0 < 1.123.83 2.0.0 < 2.41.4 2.42.0 < 2.42.1
References
Credits
🔍 vonypeto