{"id":"CVE-2026-54312","title":"n8n: Microsoft SQL Node Prototype Pollution","summary":"n8n: Microsoft SQL Node Prototype Pollution","severity":"high","cvss":8.5,"cwe":["CWE-1321"],"vendor":"n8n","product":"n8n","ecosystem":"npm","affected":["n8n < 2.24.0"],"patched":["n8n 2.24.0"],"published":"2026-06-16","updated":"2026-06-16","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-x6p3-m6h9-fx7r","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-x6p3-m6h9-fx7r"},{"url":"https://github.com/advisories/GHSA-x6p3-m6h9-fx7r"}],"tags":["ghsa","npm"],"epss":0.00396,"epssPercentile":0.33601,"ingestedAt":"2026-06-29T14:31:47.478Z","slug":"CVE-2026-54312","body":"## Overview\n\n## Impact\nAn 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.\n\n## Patches\nThe issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Limit workflow creation and editing permissions to fully trusted users only.\n- Disable the Microsoft SQL node by adding `n8n-nodes-base.microsoftSql` to the `NODES_EXCLUDE` environment variable.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.\n\n## Affected packages\n\n- `n8n < 2.24.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `n8n 2.24.0`","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":46.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}