Is CVE-2026-56356 in the CISA KEV catalog?

No. CVE-2026-56356 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-56356?

CVE-2026-56356 has a CVSS v3 base score of 5.4 (MEDIUM).

How do I fix or mitigate CVE-2026-56356?

No published fix for CVE-2026-56356 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-56356

MEDIUM

5.4

CVSS v3

NVD

Description

n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.

CWE-79Cross-Site Scripting (XSS)

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

EPSS data unavailable for this CVE.

References

Other references2

Embed a live status badge for CVE-2026-56356

Markdown

[![CVE-2026-56356](https://tridentstack.com/cve/badge/CVE-2026-56356.svg)](https://tridentstack.com/cve/CVE-2026-56356)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-56356"><img src="https://tridentstack.com/cve/badge/CVE-2026-56356.svg" alt="CVE-2026-56356"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-01.