Incomplete List of Disallowed Inputs Affecting n8n package, versions <2.25.7>=2.26.0 <2.26.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-N8N-17889838
- published8 Jul 2026
- disclosed30 Jun 2026
- creditHussein Aldulaimi
Introduced: 30 Jun 2026
NewCVE-2026-56777 (opens in a new tab)How to fix?
Upgrade n8n to version 2.25.7, 2.26.2 or higher.
Overview
n8n is a n8n Workflow Automation Tool
Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs for the Python Code node when the Python Task Runner is enabled. A user with permission to create or modify workflows can evade the validator and reach the task executor module namespace by authoring Python in that node, and on instances configured with N8N_BLOCK_RUNNER_ENV_ACCESS=false can read environment variables available to the task runner process. Exploitation is limited to self-hosted instances with the Python Task Runner enabled, and the environment variable disclosure applies only when N8N_BLOCK_RUNNER_ENV_ACCESS=false.
Workaround
This vulnerability can be avoided by disabling the Python Code node through the NODES_EXCLUDE environment variable, or by disabling the Python Task Runner entirely.