GHSA-6h4j-wcr9-2vg7

Source

https://github.com/advisories/GHSA-6h4j-wcr9-2vg7

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-6h4j-wcr9-2vg7/GHSA-6h4j-wcr9-2vg7.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-6h4j-wcr9-2vg7

Aliases

CVE-2026-45732

Published

2026-05-14T16:18:14Z

Modified

2026-05-14T16:36:07.710925Z

Severity

8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N CVSS Calculator

Summary

n8n Has a Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints

Details

Impact

The OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations.

This issue affects instances where credentials are shared with other users or across projects.

Patches

The issue has been fixed in n8n versions 1.123.43, 2.20.7, and 2.21.1. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict credential sharing to fully trusted users only. - Audit shared credentials for unexpected OAuth token changes and revoke any tokens that may have been replaced.

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

n8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backwards compatibility.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Database specific

{
    "github_reviewed": true,
    "severity": "HIGH",
    "github_reviewed_at": "2026-05-14T16:18:14Z",
    "nvd_published_at": null,
    "cwe_ids": [
        "CWE-639"
    ]
}

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

0Unknown introduced version / All previous versions are affected

Fixed

1.123.43

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-6h4j-wcr9-2vg7/GHSA-6h4j-wcr9-2vg7.json"

npm / n8n

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

2.21.0

Fixed

2.21.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-6h4j-wcr9-2vg7/GHSA-6h4j-wcr9-2vg7.json"

npm / n8n

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

2.0.0-rc.0

Fixed

2.20.7

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-6h4j-wcr9-2vg7/GHSA-6h4j-wcr9-2vg7.json"