HIGH 8.7 NVD
CVE-2026-85169
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 nam
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.
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-9x83-43r8-5hwc
- https://www.vulncheck.com/advisories/n8n-before-1.123.73-remote-code-execution-via-fromai-
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-03 via NVD.
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