CVE-2026-110848 n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge
Authenticated users can cause denial of service in n8n by polluting the prototype via AI workflow builder connections.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110848?
CVE-2026-110848 is a medium-severity vulnerability in n8n-io n8n, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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
Which versions are affected by CVE-2026-110848?
How do I fix CVE-2026-110848?
No fix has been published for CVE-2026-110848 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-110848 being exploited?
There is no known exploitation of CVE-2026-110848 in the wild and no public exploit code.
Sources
Also known as GHSA-3p2g-2wpm-8h3g, GHSA-v3wp-jvw4-xcp3.