What’s Vulnerable › Vulnerabilities
CVE-2026-54306: n8n: Prototype Pollution enables confused-deputy execution via public webhooks
- Severity: medium (CVSS 6.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-23 · updated 2026-10-25
- Weakness: CWE-1321
Description
n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, a prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes. Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials. This vulnerability is fixed in 2.25.7 and 2.26.2.
Affected products
- n8n-io n8n: before 2.25.7; from 2.26.0 before 2.26.2 — fixed in 2.25.7, 2.26.2
How to fix
Upgrade to a fixed version: n8n-io n8n 2.25.7, 2.26.2. Check the vendor advisory for mitigations.
References
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