{"cve":"CVE-2026-21877","nvd":{"published":"2026-01-08T01:15:55.697","modified":"2026-06-17T10:19:04.527","status":"Analyzed","description":"n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9},"cwes":["CWE-94","CWE-434"],"references":["https://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6","https://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263"],"products":["n8n:n8n"],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2026-21877","score":0.05449,"percentile":0.92733,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v364-rw7m-3263","url":"https://osv.dev/vulnerability/GHSA-v364-rw7m-3263","summary":"n8n Vulnerable to RCE via Arbitrary File Write","modified":"2026-02-03T03:16:47.897278Z","packages":[{"ecosystem":"npm","name":"n8n","purl":"pkg:npm/n8n","ranges":[">=0.123.0 <1.121.3"],"fixed":["1.121.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}