CVE-2026-86996

Summary

n8n: Agent Workflow Tool Bypasses Sub-Workflow Caller Policy

Severity

medium

EPSS

0.2% (p15)

CWE

CWE-862

Also known as

GHSA-7hgx-277f-7vmg

Published

2026-09-08

Updated

2026-09-08

Advisory details

Impact

A workflow's "This workflow can be called by" setting was enforced by the Execute Workflow node but was not consulted when the same workflow was attached to an Agent as a tool. A user who could build an Agent could therefore call a workflow that its owner had restricted, and read back what it returned. The patch applies the sub-workflow caller policy on the Agent tool path.

Patches

The issue has been fixed in n8n versions 2.37.7 and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

• Restrict n8n instance access to fully trusted users only.
• Audit workflows attached as Agent tools and review their caller policy settings.
• Remove sensitive workflows from Agent tool configurations until the instance is patched.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

References

• https://github.com/advisories/GHSA-7hgx-277f-7vmg
• https://github.com/n8n-io/n8n/security/advisories/GHSA-7hgx-277f-7vmg
• https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7
• https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2

Related advisories

• CVE-2026-86085 — medium · npm/n8n
• CVE-2026-86993 — medium · npm/n8n
• CVE-2026-86994 — medium · npm/n8n
• CVE-2026-86077 — medium · npm/n8n
• CVE-2026-86083 — high · npm/n8n
• CVE-2026-86082 — high · npm/n8n
• CVE-2026-86081 — high · npm/n8n
• CVE-2026-86075 — high · npm/n8n

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Summarize with AI

ChatGPTClaudePerplexity