CVE-2026-25051: N8n Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-825q-w924-xhgx
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CWE-79
Published
Advisory Summary

CVE-2026-25051 is a HIGH remote code execution vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting N8n libraries in the npm ecosystem. The issue involves n8n's improper csp enforcement in webhook responses may allow stored xss. Remediation is available by upgrading affected packages to version 1.123.2, 1.122.5.

CVE-2026-25051 at a Glance

CVE Identifier CVE-2026-25051
GHSA Identifier GHSA-825q-w924-xhgx
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product N8n
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-25051

To remediate this vulnerability, upgrade all affected N8n dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

n8n fixed: 1.123.2 
npm install n8n@1.123.2
n8n fixed: 1.122.5 
npm install n8n@1.122.5
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls n8n

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-25051, inspect your project dependencies using npm:

npm ls n8n

Analyze the terminal output to locate any version of N8n in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.123.2), your application is affected.

Note: The npm ls n8n command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In N8n, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Impact A Cross-site Scripting (XSS) vulnerability has been identified in the handling of webhook responses and related HTTP endpoints. Under certain conditions, the Content Security Policy (CSP) sandbox protection intended to isolate HTML responses may not be applied correctly. An authenticated user with permission to create or modify workflows could abuse this to execute malicious scripts with same-origin privileges when other users interact with the crafted workflow. This could lead to session hijacking and account takeover. ## Patches The issue has been fixed in n8n versions 1.122.5 and 1.123.2. Users should upgrade to 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. - Never execute untrusted workflows. - Review workflows that receive data from via webhooks, forms, or MCP servers to ensure they are communicating with trusted entities before executing them manually. 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 backward compatibility. CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CVE-2026-25051 Affected N8n Versions

2 component(s)
Fixed Versions:
1.123.21.122.5
Product / Package Ecosystem Affected Versions Fixed Version
n8n
npm/n8n
npm
≥ 1.123.0
< 1.123.2
1.123.2
n8n
npm/n8n
npm
< 1.122.5
1.122.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/n8n-io/n8n/security/advisories/GHSA-825q-w924-xhgx
NVD — CVE-2026-25051 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25051
Security Fix Commit FIX COMMIT
https://github.com/n8n-io/n8n/commit/ced34c0f93ab4c759a56065965986094d8ef7323
Security Fix Commit FIX COMMIT
https://github.com/n8n-io/n8n/commit/e8cf4d6bb3af94dc296cbb67bc3dd20e9b508ac9
N8n Source Repository REPOSITORY
https://github.com/n8n-io/n8n

Frequently Asked Questions

What is CVE-2026-25051?
CVE-2026-25051 is a security vulnerability in N8n involving n8n's Improper CSP Enforcement in Webhook Responses May Allow Stored XSS under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which N8n versions are affected?
Affected versions include releases prior to 1.123.2, 1.122.5 across affected packages: n8n.
What version fixes CVE-2026-25051?
Upgrading to 1.123.2, 1.122.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is n8n affected?
Yes, n8n is affected in releases prior to 1.123.2, 1.122.5. Upgrade your dependency to 1.123.2, 1.122.5 or later.
What CWE is associated with CVE-2026-25051?
CVE-2026-25051 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-25051?
Run the dependency tree command: 'npm ls n8n'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-825q-w924-xhgx",
  "modified" : "2026-02-04T19:53:21Z",
  "published" : "2026-02-04T18:15:51Z",
  "aliases" : [ "CVE-2026-25051" ],
  "summary" : "n8n's Improper CSP Enforcement in Webhook Responses May Allow Stored XSS",
  "details" : "## Impact\n\nA Cross-site Scripting (XSS) vulnerability has been identified in the handling of webhook responses and related HTTP endpoints. Under certain conditions, the Content Security Policy (CSP) sandbox protection intended to isolate HTML responses may not be applied correctly.\n\nAn authenticated user with permission to create or modify workflows could abuse this to execute malicious scripts with same-origin privileges when other users interact with the crafted workflow. This could lead to session hijacking and account takeover.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.122.5 and 1.123.2. Users should upgrade to these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n\n- Limit workflow creation and editing permissions to fully trusted users only.\n- Never execute untrusted workflows.\n- Review workflows that receive data from via webhooks, forms, or MCP servers to ensure they are communicating with trusted entities before executing them manually.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.\n\n---\nn8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backward compatibility.\n\nCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.123.0"
      }, {
        "fixed" : "1.123.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.122.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-825q-w924-xhgx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25051"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/commit/ced34c0f93ab4c759a56065965986094d8ef7323"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/commit/e8cf4d6bb3af94dc296cbb67bc3dd20e9b508ac9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/n8n-io/n8n"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-04T18:15:51Z",
    "nvd_published_at" : "2026-02-04T17:16:22Z"
  }
}