CVE-2026-59209: n8n Shared Credential Header Leak Vulnerability
HIGHCVE-2026-59209 is a HIGH shared credential header leak vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting n8n libraries in the npm ecosystem. The issue involves shared credential header leak via http request pagination expression. Remediation is available by upgrading affected packages to version 1.123.61, 2.28.1, 2.27.4.
CVE-2026-59209 at a Glance
How to Fix CVE-2026-59209
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@1.123.61npm install n8n@2.28.1npm install n8n@2.27.4Run 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-2026-59209, 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 1.123.61), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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-2026-59209 Affected n8n Versions
3 component(s)References
Frequently Asked Questions
What is CVE-2026-59209?
Which n8n versions are affected?
What version fixes CVE-2026-59209?
Is n8n affected?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-q3j5-8vrg-4p9q",
"modified" : "2026-07-22T21:54:53Z",
"published" : "2026-07-22T21:54:53Z",
"aliases" : [ "CVE-2026-59209" ],
"summary" : "n8n: Shared Credential Header Leak via HTTP Request Pagination Expression",
"details" : "## Impact\nAn authenticated member with use-only editor access to a shared workflow could read credential-populated headers exposed via the `$request` object inside an HTTP Request node's pagination expression. When an HTTP Header Auth credential is applied to a paginated request, the secret is present in `$request.headers` when pagination expressions are evaluated. A user-controlled expression could read that secret, copy it into item data, and exfiltrate it through a later HTTP Request node, bypassing credential domain restrictions, since the secret leaves via item data rather than the credential's own request mechanism.\n\nThis issue only affects instances with `N8N_EXPRESSION_ENGINE=vm` set, where paginated HTTP Request workflows using shared credentials are accessible to non-owner users.\n\n## Patches\nThe issue has been fixed in n8n versions 1.123.61, 2.27.4, and 2.28.1. 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 workflow sharing to fully trusted users only.\n- Avoid sharing credentials with use-only access to untrusted users on workflows that use HTTP Request nodes with pagination enabled.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.123.61"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.28.0"
}, {
"fixed" : "2.28.1"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "n8n"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.0.0-rc.0"
}, {
"fixed" : "2.27.4"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-q3j5-8vrg-4p9q"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-59209"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/n8n-io/n8n"
}, {
"type" : "WEB",
"url" : "https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4"
}, {
"type" : "WEB",
"url" : "https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-200" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-07-22T21:54:53Z",
"nvd_published_at" : "2026-07-09T17:17:01Z"
}
}