CVE-2026-21894: N8n N8n's Missing Stripe-Signature Verification Allows Vulnerability

MODERATE
Advisory Identifier: GHSA-jf52-3f2h-h9j5
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CVSS 6.5
CWE-290
Published
Advisory Summary

CVE-2026-21894 is a MODERATE (CVSS 6.5) n8n's missing stripe-signature verification allows vulnerability (CWE-290: Authentication Bypass by Spoofing) affecting N8n libraries in the npm ecosystem. The issue involves n8n's missing stripe-signature verification allows unauthenticated forged webhooks. Remediation is available by upgrading affected packages to version 2.2.2.

CVE-2026-21894 at a Glance

CVE Identifier CVE-2026-21894
GHSA Identifier GHSA-jf52-3f2h-h9j5
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-290: Authentication Bypass by Spoofing
Affected Product N8n
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

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

How to Fix CVE-2026-21894

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: 2.2.2 
npm install n8n@2.2.2
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-2026-21894, 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 2.2.2), 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-290: Authentication Bypass by Spoofing, where this attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. 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 An authentication bypass in the Stripe Trigger node allows unauthenticated parties to trigger workflows by sending forged Stripe webhook events. The Stripe Trigger creates and stores a Stripe webhook signing secret when registering the webhook endpoint, but incoming webhook requests were not verified against this secret. As a result, any HTTP client that knows the webhook URL could send a POST request containing a matching event `type`, causing the workflow to execute as if a legitimate Stripe event had been received. This issue affects n8n users who have active workflows using the Stripe Trigger node. An attacker could potentially fake payment or subscription events and influence downstream workflow behavior. The practical risk is reduced by the fact that the webhook URL contains a high-entropy UUID; however, authenticated n8n users with access to the workflow can view this webhook ID. ### Patches The issue has been fixed in n8n version 2.2.2. Users should upgrade to this version or later to ensure that Stripe webhook signatures are properly verified. ### Workarounds There is no complete workaround short of upgrading. As a temporary mitigation, users can deactivate affected workflows or restrict access to workflows containing Stripe Trigger nodes to trusted users only.

CVE-2026-21894 Affected N8n Versions

1 component(s)
Fixed Versions:
2.2.2
Product / Package Ecosystem Affected Versions Fixed Version
n8n
npm/n8n
npm
≥ 0.150.0
< 2.2.2
2.2.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/n8n-io/n8n/security/advisories/GHSA-jf52-3f2h-h9j5
NVD — CVE-2026-21894 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21894
N8n Source Repository REPOSITORY
https://github.com/n8n-io/n8n/pull/22764
Security Fix Commit FIX COMMIT
https://github.com/n8n-io/n8n/commit/a61a5991093c41863506888336e808ac1eff8d59
N8n Source Repository REPOSITORY
https://github.com/n8n-io/n8n

Frequently Asked Questions

What is CVE-2026-21894?
CVE-2026-21894 is a security vulnerability in N8n involving n8n's Missing Stripe-Signature Verification Allows Unauthenticated Forged Webhooks under CWE-290: Authentication Bypass by Spoofing.
Which N8n versions are affected?
Affected versions include releases prior to 2.2.2 across affected packages: n8n.
What version fixes CVE-2026-21894?
Upgrading to 2.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is n8n affected?
Yes, n8n is affected in releases prior to 2.2.2. Upgrade your dependency to 2.2.2 or later.
What is the CVSS score of CVE-2026-21894?
CVE-2026-21894 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
What CWE is associated with CVE-2026-21894?
CVE-2026-21894 is classified under CWE-290: Authentication Bypass by Spoofing (This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.).
How can I check npm dependencies for CVE-2026-21894?
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-jf52-3f2h-h9j5",
  "modified" : "2026-01-08T20:51:27Z",
  "published" : "2026-01-07T19:22:54Z",
  "aliases" : [ "CVE-2026-21894" ],
  "summary" : "n8n's Missing Stripe-Signature Verification Allows Unauthenticated Forged Webhooks",
  "details" : "### Impact\nAn authentication bypass in the Stripe Trigger node allows unauthenticated parties to trigger workflows by sending forged Stripe webhook events.\n\nThe Stripe Trigger creates and stores a Stripe webhook signing secret when registering the webhook endpoint, but incoming webhook requests were not verified against this secret. As a result, any HTTP client that knows the webhook URL could send a POST request containing a matching event `type`, causing the workflow to execute as if a legitimate Stripe event had been received.\n\nThis issue affects n8n users who have active workflows using the Stripe Trigger node. An attacker could potentially fake payment or subscription events and influence downstream workflow behavior. The practical risk is reduced by the fact that the webhook URL contains a high-entropy UUID; however, authenticated n8n users with access to the workflow can view this webhook ID.\n\n### Patches\nThe issue has been fixed in n8n version 2.2.2. Users should upgrade to this version or later to ensure that Stripe webhook signatures are properly verified.\n\n### Workarounds\nThere is no complete workaround short of upgrading. As a temporary mitigation, users can deactivate affected workflows or restrict access to workflows containing Stripe Trigger nodes to trusted users only.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.150.0"
      }, {
        "fixed" : "2.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-jf52-3f2h-h9j5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-21894"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/pull/22764"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/commit/a61a5991093c41863506888336e808ac1eff8d59"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/n8n-io/n8n"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-290" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-07T19:22:54Z",
    "nvd_published_at" : "2026-01-08T10:15:55Z"
  }
}