CVE-2026-54312: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in n8n-io n8n
n8n is an open source workflow automation platform. Prior to 2.24.0, an authenticated user with permission to create or modify workflows could achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter. This pollutes Object.prototype process-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted. This vulnerability is fixed in 2.24.0.
AI Analysis
Technical Summary
CVE-2026-54312 describes a prototype pollution vulnerability in the open source workflow automation platform n8n. Specifically, before version 2.24.0, an authenticated user with workflow modification permissions could exploit the Microsoft SQL node by providing a malicious table parameter. This leads to global pollution of Object.prototype for the lifetime of the n8n server process, causing widespread validation failures and making the application unusable until a restart occurs. The vulnerability is classified under CWE-1321 and has a CVSS 4.0 base score of 7.2, indicating high severity. The vulnerability is resolved in n8n version 2.24.0.
Potential Impact
Exploitation allows an authenticated user with workflow creation or modification permissions to perform global prototype pollution, affecting the entire n8n server process. This causes application-wide validation failures and renders the n8n instance completely non-functional until the server process is restarted. The impact is high as it disrupts normal operations and requires manual intervention to restore service.
Mitigation Recommendations
This vulnerability is fixed in n8n version 2.24.0. Users should upgrade to version 2.24.0 or later to remediate this issue. Since the vendor advisory does not specify an official patch or temporary fix beyond this, upgrading is the recommended remediation. There is no indication that this is a cloud service; therefore, remediation is the responsibility of the user.
CVE-2026-54312: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in n8n-io n8n
Description
n8n is an open source workflow automation platform. Prior to 2.24.0, an authenticated user with permission to create or modify workflows could achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter. This pollutes Object.prototype process-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted. This vulnerability is fixed in 2.24.0.
CVSS v4.0
Score 7.2high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54312 describes a prototype pollution vulnerability in the open source workflow automation platform n8n. Specifically, before version 2.24.0, an authenticated user with workflow modification permissions could exploit the Microsoft SQL node by providing a malicious table parameter. This leads to global pollution of Object.prototype for the lifetime of the n8n server process, causing widespread validation failures and making the application unusable until a restart occurs. The vulnerability is classified under CWE-1321 and has a CVSS 4.0 base score of 7.2, indicating high severity. The vulnerability is resolved in n8n version 2.24.0.
Potential Impact
Exploitation allows an authenticated user with workflow creation or modification permissions to perform global prototype pollution, affecting the entire n8n server process. This causes application-wide validation failures and renders the n8n instance completely non-functional until the server process is restarted. The impact is high as it disrupts normal operations and requires manual intervention to restore service.
Mitigation Recommendations
This vulnerability is fixed in n8n version 2.24.0. Users should upgrade to version 2.24.0 or later to remediate this issue. Since the vendor advisory does not specify an official patch or temporary fix beyond this, upgrading is the recommended remediation. There is no indication that this is a cloud service; therefore, remediation is the responsibility of the user.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-12T18:42:02.222Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3aafb0eed863c81e44dd60
Added to database: 06/23/2026, 16:09:20 UTC
Last enriched: 06/23/2026, 16:24:15 UTC
Last updated: 06/23/2026, 16:39:50 UTC
Views: 2
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