CVE-2026-42228
n8n Vulnerable to Hijacking of Unauthenticated Chat Execution
描述
## Impact The `/chat` WebSocket endpoint used by the Chat Trigger node's Hosted Chat feature did not verify that an incoming connection was authorized to interact with the target execution. An unauthenticated remote attacker who could identify a valid execution ID for a workflow in a waiting state could attach to that execution, receive the pending prompt intended for the legitimate user, and submit arbitrary input to resume or influence downstream workflow behavior. Exploitation requires the following conditions: - The instance exposes a public Hosted Chat workflow with authentication set to `None`. - A target execution is in a waiting state at the time of the attack. - The attacker can obtain or discover the execution ID of that waiting execution. ## Patches The issue has been fixed in n8n versions 1.123.32, 2.17.4, and 2.18.1. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Enable authentication on all Chat Trigger nodes by setting the Authentication field to `n8n User Auth` rather than `None`. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures. --- n8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backwards compatibility. CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
如何修補 CVE-2026-42228
要修補 CVE-2026-42228,請將受影響套件升級到下列已修補版本。
- —升級至 1.123.32 或更新版本
CVE-2026-42228 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 1.123.32