CVE-2026-21877
n8n Vulnerable to RCE via Arbitrary File Write
描述
### Impact n8n is affected by an authenticated Remote Code Execution (RCE) vulnerability. Under certain conditions, an authenticated user may be able to cause untrusted code to be executed by the n8n service. This could result in full compromise of the affected instance. Both self-hosted and n8n Cloud instances are impacted. ### Patches The issue has been resolved in n8n version 1.121.3. Users are advised to upgrade to this version or later to fully address the vulnerability. ### Workarounds If upgrading is not immediately possible, administrators can reduce exposure by disabling the Git node and limiting access for untrusted users. ### References - n8n documentation: [Blocking access to nodes](https://docs.n8n.io/hosting/securing/blocking-nodes/)
如何修補 CVE-2026-21877
要修補 CVE-2026-21877,請將受影響套件升級到下列已修補版本。
- —升級至 1.121.3 或更新版本
CVE-2026-21877 正在被利用嗎?
中等 — EPSS 為 5.3%,可持續追蹤但非最高優先。
受影響套件(1)
- >= 0.123.0, < 1.121.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |