Vulnerability Description
n8n versions before 1.123.73, 2.35.4, and 2.36.2 contain an expression sandbox escape in the $fromAI handler. $fromAI resolved a caller-supplied placeholder name without requiring it to be an own property and admitted reserved keys; against a primitive input value it returned a live host-prototype reference. An attacker with workflow-build privilege can walk the prototype chain to the Function constructor and compile/execute arbitrary code in the main n8n process, leading to remote code execution.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N | N8N | < 1.123.73 |
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-9x83-43r8-5hwcMitigationVendor Advisory
- https://www.vulncheck.com/advisories/n8n-before-1.123.73-remote-code-execution-vThird Party Advisory
FAQ
What is CVE-2026-85169?
CVE-2026-85169 is a vulnerability with a CVSS score of 8.8 (HIGH). n8n versions before 1.123.73, 2.35.4, and 2.36.2 contain an expression sandbox escape in the $fromAI handler. $fromAI resolved a caller-supplied placeholder name without requiring it to be an own prop...
How severe is CVE-2026-85169?
CVE-2026-85169 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-85169?
Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.