# CVE-2026-56358: n8n - Stored Cross-Site Scripting in Form Trigger Node

> CVE-2026-56358: n8n - Stored Cross-Site Scripting in Form Trigger Node. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-56358
Last updated: 2026-06-26T02:02:10Z

- Published: 2026-06-24 11:53 UTC · Updated: 2026-06-26 02:02 UTC · Assigner: VulnCheck
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS: 0.24%, 15th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-79

## Description

n8n before 1.123.25 (1.x) and before 2.11.2 (2.x), with the fix also included in 2.12.0, contains a stored cross-site scripting vulnerability in the Form Trigger node's CSS sanitization that allows authenticated users to inject malicious scripts. Attackers with workflow creation permissions can inject XSS payloads that execute persistently for all form visitors, enabling form hijacking and phishing attacks.

## Affected vendors and products

- n8n: n8n

## Tracked companies

- [n8n](https://rewindex.com/company/n8n.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-56358)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-56358)
- [https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g](https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g)
- [https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-trigger-node](https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-trigger-node)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-56358 · Markdown: https://rewindex.com/cve/CVE-2026-56358.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-56358 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:56.089Z