CVE-2026-77072
Stored XSS in n8n Form completion page enables same-origin script execution.
Is CVE-2026-77072 being exploited?
Not confirmed. CVE-2026-77072 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-77072?
CVE-2026-77072 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-77072?
Yes. A fix has been recorded for CVE-2026-77072. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77072 affect?
CVE-2026-77072 affects n8n <1.123.69, n8n <2.33.4, n8n <2.34.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77072?
Upgrade to fixed n8n releases (>=1.123.69, >=2.33.4, >=2.34.1) and revoke/sanitize exposed sessions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can create a public form causing stored XSS; visitor browsers execute same-origin scripts, enabling session theft, CSRF, and account takeover.
Immediate action required
- affected< 1.123.69
- affected>= 2.34.0 and < 2.34.1
- affected>= 2.0.0 and < 2.33.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.