Vulnerability Description
n8n before 1.123.69, 2.33.4, and 2.34.1 contains a stored cross-site scripting vulnerability in the Form node's completion page. The completion page applied its sandboxing Content-Security-Policy only when respondWith was not set to 'redirect', but responseText was always rendered as raw HTML. An authenticated member could set respondWith to 'redirect' via an expression while keeping responseText populated, causing the completion page to serve unsanitized HTML and script from the n8n origin. Any visitor who submitted the resulting public form would have that script execute same-origin with their session.
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-rmr5-775f-jvm2
- https://www.vulncheck.com/advisories/n8n-before-stored-xss-via-form-completion-p
FAQ
What is CVE-2026-77072?
CVE-2026-77072 is a documented vulnerability. n8n before 1.123.69, 2.33.4, and 2.34.1 contains a stored cross-site scripting vulnerability in the Form node's completion page. The completion page applied its sandboxing Content-Security-Policy only...
How severe is CVE-2026-77072?
CVSS scoring is not yet available for CVE-2026-77072. Check NVD for updates.
Is there a patch for CVE-2026-77072?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.