CVE-2026-59206
n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration
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.
INFO
Published Date :
July 9, 2026, 4:16 p.m.
Last Modified :
July 9, 2026, 4:25 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-59206
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update n8n to version 1.123.61 or later.
- Update n8n to version 2.27.4 or later.
- Update n8n to version 2.28.1 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59206.
| URL | Resource |
|---|---|
| https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4 | |
| https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1 | |
| https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59206 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59206
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59206 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59206 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n8n-io', 'product': 'n8n', 'versions': [{'status': 'affected', 'version': '>= 2.28.0, < 2.28.1'}, {'status': 'affected', 'version': '>= 2.0.0-rc.0, < 2.27.4'}, {'status': 'affected', 'version': '< 1.123.61'}]}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-1321 Added Reference https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4 Added Reference https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1 Added Reference https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9