{"id":"CVE-2026-27577","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-27577","generatedAt":"2026-10-31T06:00:39.811Z","title":"An authenticated user with permission to create or modify workflows could abuse crafted expressions in workflow parameters to trigger unintended system command execution on the host running n8n.","description":"n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, additional exploits in the expression evaluation of n8n have been identified and patched following CVE-2025-68613. An authenticated user with permission to create or modify workflows could abuse crafted expressions in workflow parameters to trigger unintended system command execution on the host running n8n. The issues have been fixed in n8n versions 2.10.1, 2.9.3, and 1.123.22. Users should upgrade to one of these versions or later to remediate all known vulnerabilities. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or deploy n8n in a hardened environment with restricted operating system privileges and network access to reduce the impact of potential exploitation. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","published":"2026-02-25T23:16:21.000Z","lastModified":"2026-07-28T05:17:05.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":9.4,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-94"],"affected":["n8n/n8n"],"epss":{"score":0.10725,"percentile":0.95815,"date":"2026-10-30","history":[{"date":"2026-09-24","score":0.01014,"percentile":0.61667},{"date":"2026-10-25","score":0.10725,"percentile":0.95789}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 10.7%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-25T00:00:00.000Z","detail":{"to":0.10725,"from":0.01133,"percentile":0.95789},"summary":"EPSS moved from 1.1% to 10.7% probability of exploitation in the next thirty days."}],"references":[{"url":"https://docs.n8n.io/hosting/securing/overview","tags":["Not Applicable"],"source":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-v98v-ff95-f3cp","tags":["Not Applicable"],"source":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-vpcf-gvg4-6qwr","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-27577","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}