CVE-2026-54306 Details
Description
n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, a prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes. Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials. This vulnerability is fixed in 2.25.7 and 2.26.2.
A prototype pollution vulnerability has been identified in n8n versions prior to 2.25.7 and 2.26.2. This vulnerability allows a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These injected fields can be accessed and used as normal values by downstream built-in nodes. When a workflow integrates a public webhook with action nodes that utilize the resulting fields, an attacker could manipulate the workflow to target unintended records or make outbound requests using the workflow owner's credentials.
Users are advised to upgrade to n8n versions 2.25.7 or 2.26.2 or later. If an immediate upgrade is not possible, consider temporarily avoiding public webhook workflows that handle sensitive data or operations, and limit workflow permissions to trusted users.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/n8n-io/n8n/security/advisories/GHSA-2vff-hj5x-8gq7 | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1321 | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| n8n n8n | < 2.25.7 >= 2.26.0, < 2.26.2 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 26, 2026 | CVE Modified | CISA-ADP |
| Jun 26, 2026 | Initial Analysis | [email protected] |
| Jun 23, 2026 | New CVE Received | [email protected] |