CVE-2026-33663: N8n N8n Is Vulnerable To Credential Vulnerability
HIGHCVE-2026-33663 is a HIGH (CVSS 9.9) n8n is vulnerable to credential vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting N8n libraries in the npm ecosystem. The issue involves n8n is vulnerable to credential theft via name-based resolution and permission checker bypass in community edition. Remediation is available by upgrading affected packages to version 1.123.27, 2.14.1, 2.13.3.
CVE-2026-33663 at a Glance
Security Impact
CVSS: 9.9
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:C/C:H/I:H/A:H).
How to Fix CVE-2026-33663
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@1.123.27npm install n8n@2.14.1npm install n8n@2.13.3Run 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-2026-33663, 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 1.123.27), 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. 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-2026-33663 Affected N8n Versions
3 component(s)References
Frequently Asked Questions
What is CVE-2026-33663?
Which N8n versions are affected?
What version fixes CVE-2026-33663?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-m63j-689w-3j35",
"modified" : "2026-03-25T21:08:33Z",
"published" : "2026-03-25T21:08:33Z",
"aliases" : [ "CVE-2026-33663" ],
"summary" : "n8n is Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass in Community Edition",
"details" : "## Impact\nAn authenticated user with the `global:member` role could exploit chained authorization flaws in n8n's credential pipeline to steal plaintext secrets from generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) belonging to other users on the same instance.\n\nThe attack abuses a name-based credential resolution path that does not enforce ownership or project scope, combined with a bypass in the credentials permission checker that causes generic HTTP credential types to be skipped during pre-execution validation. Together, these flaws allow a member-role user to resolve another user's credential ID and execute a workflow that decrypts and uses that credential without authorization.\n\nNative integration credential types (e.g. `slackApi`, `openAiApi`, `postgres`) are not affected by this issue.\n\nThis vulnerability affects Community Edition only. Enterprise Edition has additional permission gates on workflow creation and execution that independently block this attack chain.\n\n## Patches\nThe issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. 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- Restrict instance access to fully trusted users only.\n- Audit credentials stored on the instance and rotate any generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) that may have been exposed.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.123.27"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.14.0"
}, {
"fixed" : "2.14.1"
} ]
} ],
"versions" : [ "2.14.0" ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.0.0-rc.0"
}, {
"fixed" : "2.13.3"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-m63j-689w-3j35"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33663"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/n8n-io/n8n"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-639" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-03-25T21:08:33Z",
"nvd_published_at" : "2026-03-25T18:16:32Z"
}
}