High severity · published Jul 9, 2026
CVE-2026-59206
n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration
7.1
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
>= 2.28.0, < 2.28.1; >= 2.0.0-rc.0, < 2.27.4; < 1.123.61 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59206
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59206
Release Notes
https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4
Release Notes
https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1
Vendor Advisory
https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9
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