CVE-2026-42228: N8n N8n Vulnerable To Hijacking Of Vulnerability
MODERATECVE-2026-42228 is a MODERATE (CVSS 5.4) n8n vulnerable to hijacking of vulnerability (CWE-862: Missing Authorization) affecting N8n libraries in the npm ecosystem. The issue involves n8n vulnerable to hijacking of unauthenticated chat execution. Remediation is available by upgrading affected packages to version 1.123.32, 2.18.1, 2.17.4.
CVE-2026-42228 at a Glance
Security Impact
CVSS: 5.4
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:C/C:L/I:L/A:N).
How to Fix CVE-2026-42228
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.
npm install n8n@1.123.32npm install n8n@2.18.1npm install n8n@2.17.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls n8nHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-42228, inspect your project dependencies using npm:
npm ls n8nAnalyze 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 1.123.32), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. 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
CVE-2026-42228 Affected N8n Versions
3 component(s)References
Frequently Asked Questions
What is CVE-2026-42228?
Which N8n versions are affected?
What version fixes CVE-2026-42228?
Is n8n affected?
What is the CVSS score of CVE-2026-42228?
What CWE is associated with CVE-2026-42228?
How can I check npm dependencies for CVE-2026-42228?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-f77h-j2v7-g6mw",
"modified" : "2026-05-08T01:31:09Z",
"published" : "2026-04-29T21:17:44Z",
"aliases" : [ "CVE-2026-42228" ],
"summary" : "n8n Vulnerable to Hijacking of Unauthenticated Chat Execution ",
"details" : "## Impact\nThe `/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.\n\nExploitation requires the following conditions:\n- The instance exposes a public Hosted Chat workflow with authentication set to `None`.\n- A target execution is in a waiting state at the time of the attack.\n- The attacker can obtain or discover the execution ID of that waiting execution.\n\n## Patches\nThe 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.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Enable authentication on all Chat Trigger nodes by setting the Authentication field to `n8n User Auth` rather than `None`.\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 backwards compatibility.\n\nCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.123.32"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.18.0"
}, {
"fixed" : "2.18.1"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.0.0"
}, {
"fixed" : "2.17.4"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-f77h-j2v7-g6mw"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-42228"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/n8n-io/n8n"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-862" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-04-29T21:17:44Z",
"nvd_published_at" : "2026-05-04T19:16:04Z"
}
}