CVE-2026-54307High· 9.6▾ Twilightn8n: Credential Exfiltration via Permission Bypass
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 52.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.3%
0.3% → 0.4%
A member-level user with editor access to a shared workflow could reference credentials they do not own via specific public API endpoints. Credential ownership checks were only enforced partially leading to cross-user credential access.
This issue affects instances where workflow sharing is enabled and at least one workflow has been shared with a member-level user as an Editor.
The issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Credits: Momen Elkhouli
n8n < 1.123.55n8n >= 2.26.0, < 2.26.2n8n >= 2.0.0-rc.0, < 2.25.7Upgrade to a patched release:
n8n 1.123.55n8n 2.26.2n8n 2.25.7Connected by shared product, vendor, weakness, or advisory.
CVE-2026-86073High· 7.6n8n is an open source workflow automation platform
GHSA-5vfw-jc4p-fj39MediumDuplicate Advisory: Member-Level Users Can Execute Other Users' MCP Server Trigger Workflows via Missing OAuth Authorization Check
GHSA-88c4-pcqm-3r9pMediumDuplicate Advisory: GraphQL Node Bypasses "Allowed HTTP Request Domains" Restriction
GHSA-6qc9-mqvw-jg7xHighn8n: Credential Authorization Bypass via Expression in HTTP Request Node `genericAuthType`
GHSA-cj9h-qx8g-pq2gHighn8n: Shared-Workflow Editor Can Exfiltrate Credentials via Inline Sub-Workflow JSON
CVE-2026-65594Mediumn8n: Member-Level Users Can Execute Other Users' MCP Server Trigger Workflows via Missing OAuth Authorization Check