CVE-2026-54306Medium· 5.4▾ Sunlitn8n: Prototype Pollution enables confused-deputy execution via public webhooks
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.7 · 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% → 0.3%
A prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes.
Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials.
The issue has been fixed in n8n versions 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.
n8n >= 2.26.0, < 2.26.2n8n < 2.25.7Upgrade to a patched release:
n8n 2.26.2n8n 2.25.7Connected by shared product, vendor, weakness, or advisory.
CVE-2026-86078Medium· 6.5n8n is an open source workflow automation platform
GHSA-xwx6-jjhv-84p8Highn8n: Prototype Pollution via Dot-Notation Field Names Leads To Instance-Wide Denial of Service
GHSA-hx4h-vr3m-45vhMediumn8n: Prototype Pollution via VM Expression Engine Sandbox Escape Leads to Denial of Service
CVE-2026-59206Highn8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration
CVE-2026-54312High· 8.5n8n: Microsoft SQL Node Prototype Pollution
CVE-2026-72769High· 8.1n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine