CVE-2025-56265: @n8n/n8n nodes langchain Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-v2x8-97xq-8xrr
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CVSS 8.8
CWE-434 CWE-79
Published
Advisory Summary

CVE-2025-56265 is a HIGH (CVSS 8.8) cross-site scripting vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting @n8n/n8n nodes langchain libraries in the npm ecosystem. The issue involves n8n's chat trigger component is vulnerable to xss. Remediation is available by upgrading affected packages to version 1.107.0.

CVE-2025-56265 at a Glance

CVE Identifier CVE-2025-56265
GHSA Identifier GHSA-v2x8-97xq-8xrr
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product @n8n/n8n nodes langchain
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2025-56265

To remediate this vulnerability, upgrade all affected @n8n/n8n nodes langchain 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/n8n-nodes-langchain fixed: 1.107.0 
npm install @n8n/n8n-nodes-langchain@1.107.0
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/n8n-nodes-langchain

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2025-56265, inspect your project dependencies using npm:

npm ls @n8n/n8n-nodes-langchain

Analyze the terminal output to locate any version of @n8n/n8n nodes langchain in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.107.0), your application is affected.

Note: The npm ls @n8n/n8n-nodes-langchain 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In @n8n/n8n nodes langchain, 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

An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3, v1.100.1, and v1.101.1 allows attackers to execute arbitrary code via uploading a crafted HTML file.

CVE-2025-56265 Affected @n8n/n8n nodes langchain Versions

1 component(s)
Fixed Versions:
1.107.0
Product / Package Ecosystem Affected Versions Fixed Version
@n8n/n8n-nodes-langchain
npm/@n8n/n8n-nodes-langchain
npm
< 1.107.0
1.107.0

References

NVD — CVE-2025-56265 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-56265
@n8n/n8n nodes langchain Source Repository REPOSITORY
https://github.com/n8n-io/n8n/pull/18148
@n8n/n8n nodes langchain Source Repository REPOSITORY
https://github.com/n8n-io/n8n
@n8n/n8n nodes langchain Release RELEASE
https://github.com/n8n-io/n8n/releases/tag/n8n%401.107.0
@n8n/n8n nodes langchain Source Repository REPOSITORY
https://github.com/nikolas-ch/CVEs/blob/main/N8N/N8N_v1.100.1/ChatTrigger_StoredXSSviaUnrestrictedFileUpload/StoredXSSviaUnristrictedFileUpload.txt

Frequently Asked Questions

What is CVE-2025-56265?
CVE-2025-56265 is a security vulnerability in @n8n/n8n nodes langchain involving N8N's Chat Trigger component is vulnerable to XSS under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which @n8n/n8n nodes langchain versions are affected?
Affected versions include releases prior to 1.107.0 across affected packages: @n8n/n8n-nodes-langchain.
What version fixes CVE-2025-56265?
Upgrading to 1.107.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @n8n/n8n-nodes-langchain affected?
Yes, @n8n/n8n-nodes-langchain is affected in releases prior to 1.107.0. Upgrade your dependency to 1.107.0 or later.
What is the CVSS score of CVE-2025-56265?
CVE-2025-56265 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-56265?
CVE-2025-56265 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check npm dependencies for CVE-2025-56265?
Run the dependency tree command: 'npm ls @n8n/n8n-nodes-langchain'. 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-v2x8-97xq-8xrr",
  "modified" : "2025-09-10T14:51:00Z",
  "published" : "2025-09-08T18:31:42Z",
  "aliases" : [ "CVE-2025-56265" ],
  "summary" : "N8N's Chat Trigger component is vulnerable to XSS",
  "details" : "An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3, v1.100.1, and v1.101.1 allows attackers to execute arbitrary code via uploading a crafted HTML file.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@n8n/n8n-nodes-langchain"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.107.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-56265"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/pull/18148"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/n8n-io/n8n"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/releases/tag/n8n%401.107.0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nikolas-ch/CVEs/blob/main/N8N/N8N_v1.100.1/ChatTrigger_StoredXSSviaUnrestrictedFileUpload/StoredXSSviaUnristrictedFileUpload.txt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434", "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-09-10T14:50:59Z",
    "nvd_published_at" : "2025-09-08T18:15:33Z"
  }
}