GHSA-9C38-2MCM-Q7F7中危已审查

n8n: Merge Node SQL Mode Prototype Pollution

OSV 1.4.0 · github-reviewed · 修改于 2026-07-20 21:39

发布时间

2026-06-17 03:01

GitHub 审查时间

2026-06-17 03:01

NVD 发布时间

2026-06-24 00:17

源文件

advisories/github-reviewed/2026/06/GHSA-9c38-2mcm-q7f7/GHSA-9c38-2mcm-q7f7.json

公告说明

Impact

An authenticated user with permission to create or modify workflows could pollute the sandbox used by the Merge node's SQL Query mode. Because the sandbox context was cached and reused across all workflow executions on the instance, prototype mutations introduced by one user's workflow persist into subsequent Merge SQL executions belonging to other users or projects. This allowed a low-privileged attacker to intercept workflow data processed by other users on the same instance.

This issue only affects multi-user n8n instances where more than one user has permission to create and execute workflows containing the Merge node in SQL Query mode.

Patches

The issue has been fixed in n8n versions 2.25.7, and 2.26.2. 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:

Limit workflow creation and editing permissions to fully trusted users only.
Disable the Merge node by adding n8n-nodes-base.merge to the NODES_EXCLUDE environment variable.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

受影响的软件包

npm

标识信息

别名 / CVE

CVE-2026-54311

CWE

CWE-488

软件生态

npm

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS_V4

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N

原始 OSV JSON

{
  "id": "GHSA-9c38-2mcm-q7f7",
  "aliases": [
    "CVE-2026-54311"
  ],
  "details": "## Impact\nAn authenticated user with permission to create or modify workflows could pollute the sandbox used by the Merge node's SQL Query mode. Because the sandbox context was cached and reused across all workflow executions on the instance, prototype mutations introduced by one user's workflow persist into subsequent Merge SQL executions belonging to other users or projects. This allowed a low-privileged attacker to intercept workflow data processed by other users on the same instance.\n\nThis issue only affects multi-user n8n instances where more than one user has permission to create and execute workflows containing the Merge node in SQL Query mode.\n\n## Patches\nThe issue has been fixed in n8n versions 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Limit workflow creation and editing permissions to fully trusted users only.\n- Disable the Merge node by adding `n8n-nodes-base.merge` to the `NODES_EXCLUDE` environment variable.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
  "summary": "n8n: Merge Node SQL Mode Prototype Pollution",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "2.26.0"
            },
            {
              "fixed": "2.26.2"
            }
          ]
        }
      ],
      "package": {
        "name": "n8n",
        "ecosystem": "npm"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.25.7"
            }
          ]
        }
      ],
      "package": {
        "name": "n8n",
        "ecosystem": "npm"
      }
    }
  ],
  "modified": "2026-07-20T13:39:32Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"
    },
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N"
    }
  ],
  "published": "2026-06-16T19:01:16Z",
  "references": [
    {
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-9c38-2mcm-q7f7",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54311",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/n8n-io/n8n",
      "type": "PACKAGE"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-488"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "nvd_published_at": "2026-06-23T16:17:02Z",
    "github_reviewed_at": "2026-06-16T19:01:16Z"
  }
}