{"id":"CVE-2026-118679","title":"n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger","summary":"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 signin…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","cvssSource":"cna","cwe":["CWE-918"],"vendor":"n8n-io","product":"n8n","affected":["n8n < 1.123.83","n8n >= 2.42.0 < 2.42.1","n8n >= 2.0.0 < 2.41.4"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T18:59:51.136Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118679","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-3c3p-5959-3ghr","label":"GitHub Security Advisory (GHSA-3c3p-5959-3ghr)"},{"url":"https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-slack-token-exfiltration-via-slack-trigger","label":"VulnCheck Advisory: n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger"}],"tags":["cve.org"],"epss":0.00273,"epssPercentile":0.19723,"ingestedAt":"2026-10-29T15:37:07.549Z","slug":"CVE-2026-118679","body":"## Overview\n\nn8n 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.\n\n## Affected\n\n- `n8n < 1.123.83`\n- `n8n >= 2.42.0 < 2.42.1`\n- `n8n >= 2.0.0 < 2.41.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}