n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak
Impact
n8n versions before 1.123.73, 2.35.4, and 2.36.2 contain an expression sandbox escape in the $fromAI handler, allowing an attacker with workflow-build privilege to potentially execute arbitrary code. The vulnerability is due to the $fromAI handler resolving a caller-supplied placeholder name without requiring it to be an own property. An attacker can walk the prototype chain to the Function constructor.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Affected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
n8n-io · VulnCheck
n8n
2 ranges
n8n-io · VulnCheck
n8n
Package identity
pkg:npm/n8nExplore n8n →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
0 → before 1.123.73
semver versions
unaffected
1.123.73
semver versions
Other versions: unaffected
n8n-io · VulnCheck
n8n
2 ranges
n8n-io · VulnCheck
n8n
Package identity
pkg:npm/n8nExplore n8n →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
2.36.0 → before 2.36.2
semver versions
unaffected
2.36.2
semver versions
Other versions: unaffected
n8n-io · VulnCheck
n8n
2 ranges
n8n-io · VulnCheck
n8n
Package identity
pkg:npm/n8nExplore n8n →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
2.0.0-rc.0 → before 2.35.4
semver versions
unaffected
2.35.4
semver versions
Other versions: unaffected
Original source 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.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-85169View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
VulnCheck · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*Before: 1.123.73
Any condition may hold
Vulnerable product
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*From (inclusive): 2.36.0
Before: 2.36.2
Any condition may hold
Vulnerable product
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*From (inclusive): 2.0.0-rc.0
Before: 2.35.4
Original applicability statements
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}
]
}
]
},
{
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"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
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}
]
}
]
},
{
"nodes": [
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"negate": false,
"cpeMatch": [
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"versionStartIncluding": "2.0.0-rc.0"
}
]
}
]
}
]Contributing organizations · 2
Assigning organization
Additional data publisher
What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.