CVE-2026-86078 | BDVDB-2026-370413 Detail

Description#

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the Instance AI workflow summary used node names and connection keys from stored workflows as ordinary object keys. A workflow submitted through the REST API could contain __proto__ or constructor, causing nested writes to reach Object.prototype in the main n8n process and disrupt later requests. The affected function is summarizeWorkflowStructure in packages/@n8n/instance-ai/src/tools/workflows/summarize-workflow.ts. This issue is fixed in versions 2.37.7 and 2.38.2.

Impact#

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Exploit#

History#

1. Version 12026-09-08Record published in the CVE List.
2. Version 22026-09-09Most recent update recorded in the CVE List.