GHSA-p3rg-hrf9-w9gj

Suggest an improvement
Source
https://github.com/advisories/GHSA-p3rg-hrf9-w9gj
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p3rg-hrf9-w9gj/GHSA-p3rg-hrf9-w9gj.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-p3rg-hrf9-w9gj
Aliases
Downstream
Published
2026-07-22T17:57:14Z
Modified
2026-07-22T19:03:13Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N CVSS Calculator
Summary
n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview
Details

Impact

The HTML preview renders execution output into an iframe srcdoc without sandbox, so a sanitizer bypass lets injected script run same-origin as the editor. When a victim opens the preview, it can call authenticated APIs with their session. An account with global:member privileges can exploit it.

Patches

The issue has been fixed in n8n versions 1.123.64, 2.29.8, and 2.30.1. 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 n8n instance access to fully trusted users only.
  • Set the N8N_CONTENT_SECURITY_POLICY environment variable to a policy that blocks inline scripts.
  • Avoid exposing workflows that render externally-controlled input into the HTML node or binary HTML preview to untrusted users.

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

Database specific 
{
    "cwe_ids":  [
        "CWE-79"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-22T17:57:14Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}
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
0 Unknown introduced version / All previous versions are affected
Fixed
1.123.64

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p3rg-hrf9-w9gj/GHSA-p3rg-hrf9-w9gj.json"

npm / n8n

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
2.30.0
Fixed
2.30.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p3rg-hrf9-w9gj/GHSA-p3rg-hrf9-w9gj.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
2.29.8

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p3rg-hrf9-w9gj/GHSA-p3rg-hrf9-w9gj.json"