{"id":"CVE-2026-86076","title":"n8n is an open source workflow automation platform","summary":"n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __s…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"n8n","product":"n8n","affected":["n8n < 1.123.76","n8n >= 2.0.0, < 2.37.7","n8n >= 2.38.0, < 2.38.2"],"patched":["n8n 2.38.2"],"published":"2026-09-08","updated":"2026-09-11","sourceUpdated":"2026-09-11T18:20:56.680","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86076","references":[{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76","label":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7","label":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2","label":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-hw8v-xxg5-vvvx","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86076"},{"url":"https://github.com/advisories/GHSA-hw8v-xxg5-vvvx"}],"tags":["nvd","cve.org","ghsa","npm","exploit-available"],"epss":0.00793,"epssPercentile":0.56149,"aliases":["GHSA-hw8v-xxg5-vvvx"],"ecosystem":"npm","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-09T15:33:46.809003Z"},"scores":{"nvd":8.8,"cna":8.7},"ingestedAt":"2026-09-08T22:12:31.038Z","exploits":{"github":1,"githubRepos":["https://github.com/Boreas37/CVE-2026-86076-PoC"],"checkedAt":"2026-10-27T19:18:26.700Z"},"exploitAvailable":true,"slug":"CVE-2026-86076","body":"## Overview\n\nn8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __sanitize could rebind the sanitizer and reach the Function constructor, enabling backend code execution and editor-preview JavaScript execution. The affected AST hook is PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.\n\n## Affected\n\n- `n8n < 1.123.76`\n- `n8n >= 2.0.0, < 2.37.7`\n- `n8n >= 2.38.0, < 2.38.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `n8n 2.38.2`\n\n## Package advisory (CVE-2026-86076)\n\nAffected packages:\n\n- `n8n < 1.123.76`\n- `n8n >= 2.38.0, < 2.38.2`\n- `n8n >= 2.0.0, < 2.37.7`\n\nPatched in:\n\n- `n8n 1.123.76`\n- `n8n 2.38.2`\n- `n8n 2.37.7`\n\nSource: https://github.com/advisories/GHSA-hw8v-xxg5-vvvx","depth":"midnight","depthScore":61,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":230238,"id":"CVE-2026-86076","ts":1793128717447,"field":"exploit_available","old":"false","new":"true"},{"seq":202066,"id":"CVE-2026-86076","ts":1789400047472,"field":"cvss","old":"8.7","new":"8.8"},{"seq":200793,"id":"CVE-2026-86076","ts":1789397615759,"field":"cvss","old":"8.8","new":"8.7"},{"seq":199486,"id":"CVE-2026-86076","ts":1789395520491,"field":"cvss","old":"8.7","new":"8.8"},{"seq":198731,"id":"CVE-2026-86076","ts":1789392243362,"field":"cvss","old":"8.8","new":"8.7"},{"seq":197064,"id":"CVE-2026-86076","ts":1789384291771,"field":"cvss","old":"8.7","new":"8.8"},{"seq":194193,"id":"CVE-2026-86076","ts":1789378782426,"field":"cvss","old":"8.8","new":"8.7"},{"seq":192980,"id":"CVE-2026-86076","ts":1789376514411,"field":"cvss","old":"8.7","new":"8.8"},{"seq":191767,"id":"CVE-2026-86076","ts":1789373630439,"field":"cvss","old":"8.8","new":"8.7"},{"seq":190552,"id":"CVE-2026-86076","ts":1789369474658,"field":"cvss","old":"8.7","new":"8.8"},{"seq":189339,"id":"CVE-2026-86076","ts":1789368408347,"field":"cvss","old":"8.8","new":"8.7"},{"seq":188122,"id":"CVE-2026-86076","ts":1789365230070,"field":"cvss","old":"8.7","new":"8.8"},{"seq":186909,"id":"CVE-2026-86076","ts":1789363470631,"field":"cvss","old":"8.8","new":"8.7"},{"seq":185695,"id":"CVE-2026-86076","ts":1789361228406,"field":"cvss","old":"8.7","new":"8.8"},{"seq":184482,"id":"CVE-2026-86076","ts":1789358363016,"field":"cvss","old":"8.8","new":"8.7"},{"seq":182733,"id":"CVE-2026-86076","ts":1789354316435,"field":"cvss","old":"8.7","new":"8.8"},{"seq":181526,"id":"CVE-2026-86076","ts":1789353317039,"field":"cvss","old":"8.8","new":"8.7"},{"seq":180319,"id":"CVE-2026-86076","ts":1789350284061,"field":"cvss","old":"8.7","new":"8.8"},{"seq":179112,"id":"CVE-2026-86076","ts":1789348292206,"field":"cvss","old":"8.8","new":"8.7"},{"seq":177905,"id":"CVE-2026-86076","ts":1789346369358,"field":"cvss","old":"8.7","new":"8.8"},{"seq":176698,"id":"CVE-2026-86076","ts":1789343183861,"field":"cvss","old":"8.8","new":"8.7"},{"seq":174815,"id":"CVE-2026-86076","ts":1789334874990,"field":"cvss","old":"8.7","new":"8.8"},{"seq":173610,"id":"CVE-2026-86076","ts":1789333686166,"field":"cvss","old":"8.8","new":"8.7"},{"seq":172424,"id":"CVE-2026-86076","ts":1789331092345,"field":"cvss","old":"8.7","new":"8.8"},{"seq":171238,"id":"CVE-2026-86076","ts":1789328780228,"field":"cvss","old":"8.8","new":"8.7"},{"seq":170033,"id":"CVE-2026-86076","ts":1789327196494,"field":"cvss","old":"8.7","new":"8.8"},{"seq":168828,"id":"CVE-2026-86076","ts":1789323839391,"field":"cvss","old":"8.8","new":"8.7"},{"seq":167623,"id":"CVE-2026-86076","ts":1789319701774,"field":"cvss","old":"8.7","new":"8.8"},{"seq":166418,"id":"CVE-2026-86076","ts":1789318775470,"field":"cvss","old":"8.8","new":"8.7"},{"seq":165213,"id":"CVE-2026-86076","ts":1789315789288,"field":"cvss","old":"8.7","new":"8.8"},{"seq":164008,"id":"CVE-2026-86076","ts":1789313633623,"field":"cvss","old":"8.8","new":"8.7"},{"seq":162803,"id":"CVE-2026-86076","ts":1789311902745,"field":"cvss","old":"8.7","new":"8.8"},{"seq":161598,"id":"CVE-2026-86076","ts":1789308732566,"field":"cvss","old":"8.8","new":"8.7"},{"seq":159711,"id":"CVE-2026-86076","ts":1789300469937,"field":"cvss","old":"8.7","new":"8.8"},{"seq":156700,"id":"CVE-2026-86076","ts":1789294754985,"field":"cvss","old":"8.8","new":"8.7"},{"seq":155495,"id":"CVE-2026-86076","ts":1789292967267,"field":"cvss","old":"8.7","new":"8.8"},{"seq":154290,"id":"CVE-2026-86076","ts":1789289796906,"field":"cvss","old":"8.8","new":"8.7"},{"seq":151541,"id":"CVE-2026-86076","ts":1789277629200,"field":"cvss","old":"8.7","new":"8.8"},{"seq":150502,"id":"CVE-2026-86076","ts":1789276245006,"field":"cvss","old":"8.8","new":"8.7"},{"seq":149469,"id":"CVE-2026-86076","ts":1789273824054,"field":"cvss","old":"8.7","new":"8.8"},{"seq":148436,"id":"CVE-2026-86076","ts":1789271348093,"field":"cvss","old":"8.8","new":"8.7"},{"seq":146467,"id":"CVE-2026-86076","ts":1789269393941,"field":"cvss","old":"8.7","new":"8.8"},{"seq":145272,"id":"CVE-2026-86076","ts":1789266338930,"field":"cvss","old":"8.8","new":"8.7"},{"seq":144176,"id":"CVE-2026-86076","ts":1789262616099,"field":"cvss","old":"8.7","new":"8.8"},{"seq":143080,"id":"CVE-2026-86076","ts":1789261532785,"field":"cvss","old":"8.8","new":"8.7"},{"seq":141911,"id":"CVE-2026-86076","ts":1789258831116,"field":"cvss","old":"8.7","new":"8.8"},{"seq":140752,"id":"CVE-2026-86076","ts":1789256726510,"field":"cvss","old":"8.8","new":"8.7"},{"seq":139554,"id":"CVE-2026-86076","ts":1789254831395,"field":"cvss","old":"8.7","new":"8.8"},{"seq":138356,"id":"CVE-2026-86076","ts":1789251933591,"field":"cvss","old":"8.8","new":"8.7"},{"seq":137158,"id":"CVE-2026-86076","ts":1789247832080,"field":"cvss","old":"8.7","new":"8.8"}]}