Medium severity · published Jul 9, 2026
CVE-2026-59207
n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
n8n is an open source workflow automation platform. Prior to 2.27.4 and 2.28.1, the AI Agents feature did not enforce the Allowed HTTP Request Domains restriction configured on credentials when an MCP tool was pointed at an arbitrary URL, allowing a member-level user with use-only access to a shared credential to send its secret to an external server they control. This issue is fixed in versions 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:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% 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; < 2.27.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59207
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59207
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-h44j-f5r5-ph73
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