CVE-2026-59207: n8n "Allowed HTTP Request Domains" Restriction Vulnerability

HIGH
Advisory Identifier: GHSA-h44j-f5r5-ph73
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CWE-693
Published
Advisory Summary

CVE-2026-59207 is a HIGH "allowed http request domains" restriction vulnerability (CWE-693: Protection Mechanism Failure) affecting n8n libraries in the npm ecosystem. The issue involves "allowed http request domains" restriction bypass via ai agents mcp connector. Remediation is available by upgrading affected packages to version 2.28.1, 2.27.4.

CVE-2026-59207 at a Glance

CVE Identifier CVE-2026-59207
GHSA Identifier GHSA-h44j-f5r5-ph73
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-693: Protection Mechanism Failure
Affected Product n8n
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-59207

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: 2.28.1 
npm install n8n@2.28.1
n8n fixed: 2.27.4 
npm install n8n@2.27.4
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-2026-59207, 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 2.28.1), 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-693: Protection Mechanism Failure, where the product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. 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 The AI Agents feature did not enforce the "Allowed HTTP Request Domains" restriction configured on credentials. As a result, a member-level user who had been granted use-only access to a shared credential could cause its secret to be sent to an external server they control, by pointing an MCP tool at an arbitrary URL and running the agent. This issue only affects instances where the AI Agents module is enabled via `N8N_ENABLED_MODULES=agents` and at least one credential with domain restrictions has been shared with a member-level user. ## Patches The issue has been fixed in n8n version 2.28.1 and 2.27.4. Users should upgrade to this version or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Disable the AI Agents module by removing `agents` from the `N8N_ENABLED_MODULES` environment variable. - Restrict credential sharing to fully trusted users only. - Audit credentials with domain restrictions for unexpected sharing relationships. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

CVE-2026-59207 Affected n8n Versions

2 component(s)
Fixed Versions:
2.28.12.27.4
Product / Package Ecosystem Affected Versions Fixed Version
n8n
npm/n8n
npm
≥ 2.28.0
< 2.28.1
2.28.1
n8n
npm/n8n
npm
< 2.27.4
2.27.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/n8n-io/n8n/security/advisories/GHSA-h44j-f5r5-ph73
NVD — CVE-2026-59207 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59207
n8n Source Repository REPOSITORY
https://github.com/n8n-io/n8n
n8n Release RELEASE
https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4
n8n Release RELEASE
https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1

Frequently Asked Questions

What is CVE-2026-59207?
CVE-2026-59207 is a security vulnerability in n8n involving "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector under CWE-693: Protection Mechanism Failure.
Which n8n versions are affected?
Affected versions include releases prior to 2.28.1, 2.27.4 across affected packages: n8n.
What version fixes CVE-2026-59207?
Upgrading to 2.28.1, 2.27.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is n8n affected?
Yes, n8n is affected in releases prior to 2.28.1, 2.27.4. Upgrade your dependency to 2.28.1, 2.27.4 or later.
What CWE is associated with CVE-2026-59207?
CVE-2026-59207 is classified under CWE-693: Protection Mechanism Failure (The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.).
How can I check npm dependencies for CVE-2026-59207?
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-h44j-f5r5-ph73",
  "modified" : "2026-07-22T21:58:31Z",
  "published" : "2026-07-22T21:58:31Z",
  "aliases" : [ "CVE-2026-59207" ],
  "summary" : "n8n: \"Allowed HTTP Request Domains\" Restriction Bypass via AI Agents MCP Connector",
  "details" : "## Impact\nThe AI Agents feature did not enforce the \"Allowed HTTP Request Domains\" restriction configured on credentials. As a result, a member-level user who had been granted use-only access to a shared credential could cause its secret to be sent to an external server they control, by pointing an MCP tool at an arbitrary URL and running the agent.\n\nThis issue only affects instances where the AI Agents module is enabled via `N8N_ENABLED_MODULES=agents` and at least one credential with domain restrictions has been shared with a member-level user.\n\n## Patches\nThe issue has been fixed in n8n version 2.28.1 and 2.27.4. Users should upgrade to this version or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Disable the AI Agents module by removing `agents` from the `N8N_ENABLED_MODULES` environment variable.\n- Restrict credential sharing to fully trusted users only.\n- Audit credentials with domain restrictions for unexpected sharing relationships.\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:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N"
  } ],
  "affected" : [ {
    "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" : [ {
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      }, {
        "fixed" : "2.27.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-h44j-f5r5-ph73"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-59207"
  }, {
    "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-693" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-22T21:58:31Z",
    "nvd_published_at" : "2026-07-09T16:16:46Z"
  }
}