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Description

n8n before 1.123.24, 2.10.4, and 2.12.0 (across its 1.x and 2.x branches) contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creation permissions can inject malicious scripts or redirect parameters to perform stored XSS attacks or phishing redirects against end users.

PUBLISHED Reserved 2026-06-20 | Published 2026-07-10 | Updated 2026-07-10 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
MEDIUM: 4.1CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

Any version before 1.123.24
affected

1.123.24 (semver)
unaffected

2.0.0-rc.0 (semver) before 2.10.4
affected

2.10.4 (semver)
unaffected

2.11.0 (semver) before 2.12.0
affected

2.12.0 (semver)
unaffected

Default status
unaffected

Any version before 2.10.4
affected

2.10.4 (semver)
unaffected

Default status
unaffected

Any version before 1.123.24
affected

1.123.24 (semver)
unaffected

Credits

tCu0n9 reporter

References

github.com/...io/n8n/security/advisories/GHSA-w673-8fjw-457c (GitHub Security Advisory (GHSA-w673-8fjw-457c)) vendor-advisory

www.vulncheck.com/...cripting-and-open-redirect-in-form-node (VulnCheck Advisory: n8n - Cross-Site Scripting and Open Redirect in Form Node) third-party-advisory

cve.org (CVE-2026-56354)

nvd.nist.gov (CVE-2026-56354)

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