Medium severity6.5NVD Advisory· Published Sep 8, 2026· Updated Sep 11, 2026
CVE-2026-86078
CVE-2026-86078
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | >= 2.38.0, < 2.38.2 | 2.38.2 |
n8nnpm | < 2.37.7 | 2.37.7 |
Affected products
1Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-679f-58pq-4v2cghsaADVISORY
- github.com/n8n-io/n8n/security/advisories/GHSA-679f-58pq-4v2cnvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-86078ghsaADVISORY
- github.com/n8n-io/n8n/releases/tag/[email protected]nvdRelease NotesWEB
- github.com/n8n-io/n8n/releases/tag/[email protected]nvdRelease NotesWEB
News mentions
1- N8n Io: 17 Vulnerabilities Disclosed Together Impacting Workflow Automation PlatformVypr Intelligence · Sep 8, 2026