CVE-2026-65597

n8n before 1.123.64 DOM-Based XSS via Unsandboxed iframe

MEDIUM

5.4

CVSS Score

Published: July 22, 2026 at 11:21 AM UTC

Updated: October 29, 2026 at 09:16 PM UTC

2 products affected across 2 vendorsN8NN8N

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

n8n before 1.123.64, 2.x before 2.29.8, and before 2.30.1 contains a DOM-based cross-site scripting vulnerability in the HTML preview, which renders execution output into an iframe srcdoc without the sandbox attribute. A sanitizer bypass allows injected script to execute same-origin as the editor. When a victim opens the preview, the script can call authenticated APIs using the victim's session. An account with global:member privileges can exploit the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

N8N · N8Nnpm

95%

v < 1.123.642.0.0 ≤ v < 2.29.82.30.0

Affected range stops below 1.123.64, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.29.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.30.1, so it looks safe — our inference, not a vendor statement

N8N · N8N Io

90%

0 ≤ v < 1.123.640 ≤ v < 2.29.80 ≤ v < 2.30.1

Vendor states this is fixed in 1.123.64 (unaffected)

Vendor states this is fixed in 2.29.8 (unaffected)

Vendor states this is fixed in 2.30.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/n8n-io/n8n/security/advisories/GHSA-p3rg-hrf9-w9gj

References (2)

Vendor AdvisoryMitigation

Source: cverecord

https://github.com/n8n-io/n8n/security/advisories/GHSA-p3rg-hrf9-w9gj

Third Party Advisory

Source: cverecord

https://www.vulncheck.com/advisories/n8n-before-dom-based-xss-via-unsandboxed-iframe

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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