{"id":"CVE-2026-110847","title":"n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a stored cross-site scripting vulnerability in the Chat Trigger hosted-chat page, where insufficiently sanitised customCss values are interpolated into the page as…","summary":"n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a stored cross-site scripting vulnerability in the Chat Trigger hosted-chat page, where insufficiently sanitised customCss values are interpolated into the page as…","severity":"high","cvss":7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-79"],"vendor":"n8n-io","product":"n8n","affected":["n8n < 1.123.83","n8n >= 2.0.0 < 2.41.4","n8n >= 2.42.0 < 2.42.1"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T14:17:21.007","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110847","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T13:42:55.565618Z"},"cvssSource":"cna","ingestedAt":"2026-10-15T00:02:07.177Z","epss":0.00367,"epssPercentile":0.3034,"slug":"CVE-2026-110847","body":"## Overview\n\nn8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a stored cross-site scripting vulnerability in the Chat Trigger hosted-chat page, where insufficiently sanitised customCss values are interpolated into the page as markup. Workflow authors can publish a chat without n8n user authentication whose payload executes on the instance origin, acting on the sessions of signed-in visitors.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":221985,"id":"CVE-2026-110847","ts":1792039698925,"field":"cvss","old":null,"new":"7"},{"seq":221984,"id":"CVE-2026-110847","ts":1792039698925,"field":"severity","old":"none","new":"high"}]}