CVE-2026-27496
n8n has In-Process Memory Disclosure in its Task Runner
描述
## Impact An authenticated user with permission to create or modify workflows could use the JavaScript Task Runner to allocate uninitialized memory buffers. Uninitialized buffers may contain residual data from the same Node.js process — including data from prior requests, tasks, secrets, or tokens — resulting in information disclosure of sensitive in-process data. - Task Runners must be enabled using `N8N_RUNNERS_ENABLED=true`. - In external runner mode, the impact is limited to data within the external runner process. ## Patches The issue has been fixed in n8n versions >= 1.123.22, >= 2.10.1 , and >= 2.9.3. Users should upgrade to this version or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit workflow creation and editing permissions to fully trusted users only. - Use external runner mode (`N8N_RUNNERS_MODE=external`) to isolate the runner process. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
如何修補 CVE-2026-27496
要修補 CVE-2026-27496,請將受影響套件升級到下列已修補版本。
- —升級至 1.123.22 或更新版本
CVE-2026-27496 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 1.123.22
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |