CVE-2026-59207: CWE-693: Protection Mechanism Failure in n8n-io n8n
n8n versions prior to 2.27.4 and 2.28.1 contain a vulnerability in the AI Agents feature where the Allowed HTTP Request Domains restriction was not enforced on credentials. This flaw allowed a member-level user with use-only access to a shared credential to send the credential's secret to an external server they control. The issue is fixed in versions 2.27.4 and 2.28.1.
AI Analysis
Technical Summary
The vulnerability in n8n's AI Agents feature involves a failure to enforce the Allowed HTTP Request Domains restriction configured on credentials. Specifically, when an MCP tool was directed at an arbitrary URL, a member-level user with use-only access to a shared credential could exfiltrate the credential secret to an external server. This protection mechanism failure (CWE-693) affects versions prior to 2.27.4 and 2.28.1. The vulnerability has a CVSS 4.0 score of 7.1, indicating high severity. No known exploits in the wild have been reported. The issue is resolved in n8n versions 2.27.4 and 2.28.1.
Potential Impact
An attacker with member-level use-only access to a shared credential can bypass domain restrictions and send credential secrets to an external server they control. This could lead to unauthorized disclosure of sensitive credential information, potentially compromising workflows or connected systems that rely on these credentials.
Mitigation Recommendations
Upgrade n8n to version 2.27.4 or 2.28.1 or later, where the vulnerability is fixed. Since the vendor advisory does not specify a remediation level but explicitly states the fix versions, applying these updates is the recommended mitigation. No other vendor-provided mitigations or workarounds are indicated.
CVE-2026-59207: CWE-693: Protection Mechanism Failure in n8n-io n8n
Description
n8n versions prior to 2.27.4 and 2.28.1 contain a vulnerability in the AI Agents feature where the Allowed HTTP Request Domains restriction was not enforced on credentials. This flaw allowed a member-level user with use-only access to a shared credential to send the credential's secret to an external server they control. The issue is fixed in versions 2.27.4 and 2.28.1.
CVSS v4.0
Score 7.1high
Affected software
pkg:github/n8n-io/n8nRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in n8n's AI Agents feature involves a failure to enforce the Allowed HTTP Request Domains restriction configured on credentials. Specifically, when an MCP tool was directed at an arbitrary URL, a member-level user with use-only access to a shared credential could exfiltrate the credential secret to an external server. This protection mechanism failure (CWE-693) affects versions prior to 2.27.4 and 2.28.1. The vulnerability has a CVSS 4.0 score of 7.1, indicating high severity. No known exploits in the wild have been reported. The issue is resolved in n8n versions 2.27.4 and 2.28.1.
Potential Impact
An attacker with member-level use-only access to a shared credential can bypass domain restrictions and send credential secrets to an external server they control. This could lead to unauthorized disclosure of sensitive credential information, potentially compromising workflows or connected systems that rely on these credentials.
Mitigation Recommendations
Upgrade n8n to version 2.27.4 or 2.28.1 or later, where the vulnerability is fixed. Since the vendor advisory does not specify a remediation level but explicitly states the fix versions, applying these updates is the recommended mitigation. No other vendor-provided mitigations or workarounds are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-02T21:05:02.924Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4fbf4868715ace439fdda2
Added to database: 07/09/2026, 15:33:28 UTC
Last enriched: 07/22/2026, 23:29:04 UTC
Last updated: 08/22/2026, 22:52:15 UTC
Views: 112
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