Use of Uninitialized Resource Affecting @n8n/task-runner package, versions <1.59.16>=2.0.0-rc.0 <2.9.1>=2.10.0 <2.10.1
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-N8NTASKRUNNER-15763445
- published25 Mar 2026
- disclosed25 Mar 2026
- creditc0rydoras
Introduced: 25 Mar 2026
CVE-2026-27496 (opens in a new tab)How to fix?
Upgrade @n8n/task-runner to version 1.59.16, 2.9.1, 2.10.1 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Resource via 'js-task-runner.ts'. An attacker can expose residual data from the Node.js process, including secrets or tokens, by creating or modifying workflows that allocate uninitialized buffers when Task Runners are enabled.
Workaround
This vulnerability can be mitigated by limiting workflow creation and editing permissions to fully trusted users only, and by using external runner mode (N8N_RUNNERS_MODE=external) to isolate the runner process.