Vulnerability details
CVE-2026-85169
n8n-io n8n
n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak
CVSS 4.0
8.7High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| n8n-io | n8n | v < 1.123.73 | CVEProject cvelistV5 (CNA) |
| n8n-io | n8n | 2.0.0-rc.0 ≤ v < 2.35.4 | CVEProject cvelistV5 (CNA) |
| n8n-io | n8n | 2.36.0 ≤ v < 2.36.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-09-03
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.87%
Probability of exploitation in 30 days
59.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-94Improper Control of Generation of Code ('Code Injection')