CVE-2026-54312High· 8.5▾ Twilightn8n: Microsoft SQL Node Prototype Pollution
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 46.8 · 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%
An authenticated user with permission to create or modify workflows could achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter. This pollutes Object.prototype process-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted.
The issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later to remediate the vulnerability.
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
n8n-nodes-base.microsoftSql to the NODES_EXCLUDE environment variable.These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
n8n < 2.24.0Upgrade to a patched release:
n8n 2.24.0Connected 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-2026-54306Medium· 5.4n8n: Prototype Pollution enables confused-deputy execution via public webhooks
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