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CVE-2026-118648 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

n8n before 1.123.85, 2.x before 2.43.5, and 2.44.x before 2.44.1 contains a stored cross-site scripting vulnerability because some webhook response paths, such as error responses and responses without headers, omit the sandbox Content-Security-Policy. Authenticated members who can create and activate workflows can serve HTML that runs on the n8n origin, letting scripts act with the session of users who open the webhook URL.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/n8n-io/n8n/security/advisories/GHSA-mp7q-23hg-35cf	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-stored-xss-via-webhook-responses-missing-sandbox-policy	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
n8n	< 1.123.85 (semver) < 2.43.5 (semver) < 2.44.1 (semver)
CPE cpe:2.3:a:n8n:n8n::::::node.js::* Remediation Upgrade: >= 1.123.85moderate effort Upgrade: >= 2.43.5moderate effort Upgrade: >= 2.44.1moderate effort Mitigation:low effort Restrict n8n instance access to fully trusted users only. Mitigation:low effort Audit active webhook workflows and review the response bodies returned by nodes operating in legacy response mode for unexpected HTML or script content. Mitigation:low effort Apply network-level controls to restrict access to "/webhook/*" routes to trusted sources only.

Product

Versions

n8n

< 1.123.85 (semver)

< 2.43.5 (semver)

< 2.44.1 (semver)

CPE

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*

Remediation

Upgrade: >= 1.123.85moderate effort
Upgrade: >= 2.43.5moderate effort
Upgrade: >= 2.44.1moderate effort
Mitigation:low effort
Restrict n8n instance access to fully trusted users only.
Mitigation:low effort
Audit active webhook workflows and review the response bodies returned by nodes operating in legacy response mode for unexpected HTML or script content.
Mitigation:low effort
Apply network-level controls to restrict access to "/webhook/*" routes to trusted sources only.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 3, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	New CVE Received	[email protected]