n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger
Impact
n8n versions before 1.123.83, 2.41.4, and 2.42.1 contain a server-side request forgery vulnerability in the Slack Trigger webhook, allowing unauthenticated attackers to exfiltrate Slack tokens. Attackers who know the webhook URL can exploit this. The vulnerability occurs when no signing secret is set.
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 1.123.83
semver versions
unaffected
1.123.83
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
2.42.0 → before 2.42.1
semver versions
unaffected
2.42.1
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 → before 2.41.4
semver versions
unaffected
2.41.4
semver versions
Other versions: unaffected
Original source description
n8n before 1.123.83, 2.41.4, and 2.42.1 contains a server-side request forgery vulnerability in the Slack Trigger webhook that allows unauthenticated attackers to exfiltrate Slack tokens by bypassing signature verification when no signing secret is set. Attackers who know the webhook URL can name a file to download, causing the node to send the workspace access token to an attacker host and return the response.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-118679View 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: 1.123.83
Any condition may hold
Vulnerable product
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*From (inclusive): 2.42.0
Before: 2.42.1
Any condition may hold
Vulnerable product
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*From (inclusive): 2.0.0
Before: 2.41.4
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "1.123.83"
}
]
}
]
},
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.42.0",
"versionEndExcluding": "2.42.1"
}
]
}
]
},
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.0.0",
"versionEndExcluding": "2.41.4"
}
]
}
]
}
]Contributing organizations · 1
Assigning organization
What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.