CVE-2026-54312: high-severity vulnerability in n8n-io n8n
n8n: Microsoft SQL Node Prototype Pollution
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.2epss 0.4%
exploitation probability
0.4%top 68% of all CVEs
observed exploitation
nono source reports it
In short
A flaw in n8n's Microsoft SQL node allows authorized users to inject malicious code that corrupts the core foundation of the application, breaking all validation checks and making the entire system unusable until restarted.
Technical detail
Authenticated users with workflow creation permissions can exploit prototype pollution via a crafted table parameter in the Microsoft SQL node, polluting Object.prototype globally. This causes cascading validation failures across the application, rendering the n8n instance non-functional without requiring code execution or external network access.
Summary generated and translated by AI from the official description.
n8n is an open source workflow automation platform. Prior to 2.24.0, 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. This vulnerability is fixed in 2.24.0.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Affected products
n8n-io · n8nRelated CVEs — n8n-io n8n
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