CVE-2026-44789: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in n8n-io n8n
n8n, an open source workflow automation platform, has a critical prototype pollution vulnerability (CVE-2026-44789) in versions prior to 1.123.43, 2.22.1, and 2.20.7. An authenticated user with permission to create or modify workflows can exploit an unvalidated pagination parameter in the HTTP Request node to achieve global prototype pollution. This vulnerability can potentially lead to remote code execution (RCE) when combined with other techniques. The issue is fixed in versions 1.123.43, 2.22.1, and 2.20.7.
AI Analysis
Technical Summary
CVE-2026-44789 is a prototype pollution vulnerability in n8n's HTTP Request node affecting versions before 1.123.43, 2.22.1, and 2.20.7. An authenticated user with workflow modification permissions can exploit an unvalidated pagination parameter to modify global object prototypes. This improper control of object prototype attributes (CWE-1321) can be leveraged, in combination with other methods, to achieve remote code execution on the affected instance. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity. The vulnerability is fixed in the specified versions.
Potential Impact
The vulnerability allows an authenticated user with workflow creation or modification permissions to perform global prototype pollution via an unvalidated pagination parameter. This can lead to remote code execution on the affected n8n instance when combined with other techniques. The critical CVSS score (9.4) reflects the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in n8n versions 1.123.43, 2.22.1, and 2.20.7. Users should upgrade to these versions or later to remediate this vulnerability. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by the vendor advisory stating the vulnerability is fixed in these versions.
CVE-2026-44789: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in n8n-io n8n
Description
n8n, an open source workflow automation platform, has a critical prototype pollution vulnerability (CVE-2026-44789) in versions prior to 1.123.43, 2.22.1, and 2.20.7. An authenticated user with permission to create or modify workflows can exploit an unvalidated pagination parameter in the HTTP Request node to achieve global prototype pollution. This vulnerability can potentially lead to remote code execution (RCE) when combined with other techniques. The issue is fixed in versions 1.123.43, 2.22.1, and 2.20.7.
CVSS v4.0
Score 9.4critical
Affected software
Run 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
CVE-2026-44789 is a prototype pollution vulnerability in n8n's HTTP Request node affecting versions before 1.123.43, 2.22.1, and 2.20.7. An authenticated user with workflow modification permissions can exploit an unvalidated pagination parameter to modify global object prototypes. This improper control of object prototype attributes (CWE-1321) can be leveraged, in combination with other methods, to achieve remote code execution on the affected instance. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity. The vulnerability is fixed in the specified versions.
Potential Impact
The vulnerability allows an authenticated user with workflow creation or modification permissions to perform global prototype pollution via an unvalidated pagination parameter. This can lead to remote code execution on the affected n8n instance when combined with other techniques. The critical CVSS score (9.4) reflects the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in n8n versions 1.123.43, 2.22.1, and 2.20.7. Users should upgrade to these versions or later to remediate this vulnerability. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by the vendor advisory stating the vulnerability is fixed in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-07T19:20:44.691Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3ab6d8eed863c81e4f994b
Added to database: 06/23/2026, 16:39:52 UTC
Last enriched: 06/23/2026, 17:09:27 UTC
Last updated: 06/23/2026, 17:46:07 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.