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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n8n-io n8n unaffected
Version Status Constraints
0 affected < 1.123.83
1.123.83 unaffected —
n8n-io n8n unaffected
Version Status Constraints
2.42.0 affected < 2.42.1
2.42.1 unaffected —
n8n-io n8n unaffected
Version Status Constraints
2.0.0 affected < 2.41.4
2.41.4 unaffected —

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/n8n-io/n8n/security/advisories/GHSA-3c3p-5959-3ghr cve-icon cve-icon
https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-slack-token-exfiltration-via-slack-trigger cve-icon cve-icon
History

Wed, 28 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
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.
Title n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger
First Time appeared N8n
N8n n8n
Weaknesses CWE-918
CPEs cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*
Vendors & Products N8n
N8n n8n
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-28T18:59:51.136Z

Reserved: 2026-10-28T17:28:46.441Z

Link: CVE-2026-118679

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-28T19:17:34.120

Modified: 2026-10-28T19:17:34.250

Link: CVE-2026-118679

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T20:30:07Z

Weaknesses