CVE-2026-59206
n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.
| CWE | CWE-1321 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Jul 9, 2026 |
| Last Updated | Jul 9, 2026 |
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Affected Versions
n8n-io / n8n
>= 2.28.0, < 2.28.1 >= 2.0.0-rc.0, < 2.27.4 < 1.123.61