| Component | n8n |
| Severity | high (CVSS 8.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-09-08 |
| Last modified | 2026-09-11 |
| Affected versions | n8n < 1.123.76 n8n >= 2.0.0, < 2.37.7 n8n >= 2.38.0, < 2.38.2 |
| Fixed in | 1.123.76, 2.37.7, 2.38.2 |
| Weakness | CWE-94 |
| CISA KEV | not listed |
NVD description
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the legacy expression engine generated source text by calling the mutable global JSON.stringify while printing synthetic string literals and interpolating timezone data. An expression could replace JSON.stringify and cause later generated source to contain executable attacker-controlled code. The affected code-generation paths include packages/@n8n/expression-runtime/src/bridge/isolated-vm-bridge.ts and packages/@n8n/tournament/src/ExpressionBuilder.ts, and the issue does not affect the vm expression engine. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
What to do
- Upgrade n8n to
1.123.76or later (or the patched release of your branch: 2.37.7, 2.38.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-86083
- https://github.com/n8n-io/n8n/security/advisories/GHSA-6xcw-7xm6-48c6
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
Read more
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