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CVE-2026-56358

MEDIUM
5.4
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-56358
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-20 21:16 UTC
Published
2026-06-24 11:53 UTC
Last updated
2026-06-24 11:53 UTC
Primary CWE
CWE-79
Improper Neutralization of Input During Web Page Generation …
Vendor / Product
n8n / n8n
Sources
cve.org  ·  NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Affected products (3)
VendorProductPlatformVersions
n8n n8n — 0 < 1.123.25, 1.123.25, 2.0.0-rc.0 < 2.11.2, 2.11.2
n8n n8n — 0 < 2.11.2, 2.11.2
n8n n8n — 0 < 1.123.25, 1.123.25
Weakness (CWE)
CWESourceDescription
CWE-79 cna Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS scores (2)
ScoreSeverityVersionSourceVector
5.4 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
References (2)
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