GHSA-mxrg-77hm-89hv

Source

https://github.com/advisories/GHSA-mxrg-77hm-89hv

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-mxrg-77hm-89hv

Aliases

CVE-2026-33696

Published

2026-03-26T16:41:01Z

Modified

2026-03-26T16:48:04.500896Z

Severity

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

Summary

n8n: Prototype Pollution in XML and GSuiteAdmin node parameters lead to RCE

Details

Impact

An authenticated user with permission to create or modify workflows could exploit a prototype pollution vulnerability in the GSuiteAdmin node. By supplying a crafted parameter as part of node configuration, an attacker could write attacker-controlled values onto Object.prototype. An attacker could use this prototype pollution to achieve remote code execution on the n8n instance.

Patches

The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.27. 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: - Limit workflow creation and editing permissions to fully trusted users only. - Disable the XML node by adding n8n-nodes-base.xml to the NODES_EXCLUDE environment variable.

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

Database specific

{
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-26T16:41:01Z",
    "severity": "CRITICAL",
    "nvd_published_at": "2026-03-25T18:16:32Z",
    "cwe_ids": [
        "CWE-1321"
    ]
}

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

2.14.0

Fixed

2.14.1

Affected versions

2.*

2.14.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.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

2.13.3

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.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

1.123.27

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-mxrg-77hm-89hv/GHSA-mxrg-77hm-89hv.json"