CVE-2026-110842 n8n before 2.41.4 and 2.42.1 Prototype Pollution via MCP Workflow-Validation Interpreter

n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the MCP workflow-validation tool, whose interpreter evaluates caller-supplied code in the main process, reads inherited properties, and permits assignment onto shared prototypes. An authenticated member...

CVE-2026-110842 n8n before 2.41.4 and 2.42.1 Prototype Pollution via MCP Workflow-Validation Interpreter

n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the MCP workflow-validation tool, whose interpreter evaluates caller-supplied code in the main process, reads inherited properties, and permits assignment onto shared prototypes. An authenticated member...

CVE-2026-110842

The n8n workflow automation tool (versions before 2.41.4 and 2.42.x before 2.42.1 ) is vulnerable to a prototype pollution vulnerability within the MCP workflow-validation tool . The root cause is that the tool's interpreter evaluates caller-supplied code in the main process, allowing for the rea...

CVE-2026-110842 n8n before 2.41.4 and 2.42.1 Prototype Pollution via MCP Workflow-Validation Interpreter

n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the MCP workflow-validation tool, whose interpreter evaluates caller-supplied code in the main process, reads inherited properties, and permits assignment onto shared prototypes. An authenticated member...

WS-2026-0097

n8n MCP workflow-validation interpreter the @n8n/workflow-sdk AST interpreter allowed workflow code to mutate shared prototypes. Affects n8n 2.12.0 to 2.41.3 and 2.42.0 @n8n/workflow-sdk 0.2.0 to 0.34.0 and 0.35.0; fixed in n8n 2.41.4 / 2.42.1 @n8n/workflow-sdk 0.34.1 / 0.35.1...