CVE-2026-42226: CWE-862: Missing Authorization in n8n-io n8n
n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key. The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected. This issue has been patched in versions 1.123.33, 2.17.5, and 2.18.0.
AI Analysis
Technical Summary
The vulnerability CVE-2026-42226 in n8n is due to missing authorization verification on dynamic-node-parameters endpoints. Authenticated users with access to shared workflows could supply foreign credential IDs, causing the backend to decrypt and use credentials belonging to other users in helper execution paths. This allows attackers to exfiltrate reusable API keys by forcing backend authentication against attacker-controlled infrastructure. The issue is not limited to a specific node type but affects any node that resolves credentials dynamically through these endpoints. The vulnerability is fixed in n8n versions 1.123.33, 2.17.5, and 2.18.0.
Potential Impact
An attacker with authenticated access to a shared workflow can misuse credentials of other users by supplying foreign credential IDs, leading to unauthorized use and potential exfiltration of reusable API keys. This compromises the confidentiality of credentials and may allow attackers to impersonate other users or access external systems with stolen credentials. The vulnerability affects multiple versions of n8n prior to the patched releases.
Mitigation Recommendations
This vulnerability has been patched in n8n versions 1.123.33, 2.17.5, and 2.18.0. Users should upgrade to one of these versions or later to remediate the issue. No other mitigation guidance is provided, and patching is the recommended action.
CVE-2026-42226: CWE-862: Missing Authorization in n8n-io n8n
Description
n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key. The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected. This issue has been patched in versions 1.123.33, 2.17.5, and 2.18.0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-42226 in n8n is due to missing authorization verification on dynamic-node-parameters endpoints. Authenticated users with access to shared workflows could supply foreign credential IDs, causing the backend to decrypt and use credentials belonging to other users in helper execution paths. This allows attackers to exfiltrate reusable API keys by forcing backend authentication against attacker-controlled infrastructure. The issue is not limited to a specific node type but affects any node that resolves credentials dynamically through these endpoints. The vulnerability is fixed in n8n versions 1.123.33, 2.17.5, and 2.18.0.
Potential Impact
An attacker with authenticated access to a shared workflow can misuse credentials of other users by supplying foreign credential IDs, leading to unauthorized use and potential exfiltration of reusable API keys. This compromises the confidentiality of credentials and may allow attackers to impersonate other users or access external systems with stolen credentials. The vulnerability affects multiple versions of n8n prior to the patched releases.
Mitigation Recommendations
This vulnerability has been patched in n8n versions 1.123.33, 2.17.5, and 2.18.0. Users should upgrade to one of these versions or later to remediate the issue. No other mitigation guidance is provided, and patching is the recommended action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-25T05:37:12.117Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f8eaaecbff5d8610415aed
Added to database: 5/4/2026, 6:51:26 PM
Last enriched: 5/4/2026, 7:06:46 PM
Last updated: 5/5/2026, 5:02:11 AM
Views: 6
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