GHSA-r4v6-9fqc-w5jr

Source

https://github.com/advisories/GHSA-r4v6-9fqc-w5jr

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v6-9fqc-w5jr/GHSA-r4v6-9fqc-w5jr.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-r4v6-9fqc-w5jr

Aliases

CVE-2026-42226

Published

2026-04-29T21:22:26Z

Modified

2026-05-08T01:51:10.519247Z

Severity

8.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L CVSS Calculator
7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:L/SI:L/SA:L CVSS Calculator

Summary

n8n's Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay

Details

Impact

The dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key.

The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected.

Patches

The issue has been fixed in n8n version 2.18.0. 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: - Restrict n8n access to fully trusted users only. - Avoid sharing workflows with users who should not have access to the credentials those workflows reference.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Database specific

{
    "github_reviewed": true,
    "severity": "HIGH",
    "github_reviewed_at": "2026-04-29T21:22:26Z",
    "cwe_ids": [
        "CWE-862"
    ],
    "nvd_published_at": "2026-05-04T19:16:04Z"
}

References

Affected packages

npm / n8n

Package

Name: n8n; View open source insights on deps.dev
Purl: pkg:npm/n8n

Affected ranges

Type: SEMVER
Events: Introduced

2.17.0

Fixed

2.17.5

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v6-9fqc-w5jr/GHSA-r4v6-9fqc-w5jr.json"

npm / n8n

Package

Name: n8n; View open source insights on deps.dev
Purl: pkg:npm/n8n

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.123.33

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-r4v6-9fqc-w5jr/GHSA-r4v6-9fqc-w5jr.json"