CVE-2026-42222
Unauthenticated bootstrap takeover in Nginx UI during initial install (POST /api/install).
Is CVE-2026-42222 being exploited?
Not confirmed. CVE-2026-42222 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 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-42222?
CVE-2026-42222 is rated High with a CVSS score of 8.1. 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-2026-42222?
Yes. A fix has been recorded for CVE-2026-42222. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42222 affect?
CVE-2026-42222 affects Nginx UI 2.3.5. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42222?
Restrict /api/install access; monitor activity; plan upgrade when patch released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated bootstrap takeover during initial install could grant control of the UI and install flow.
Immediate action required
- affected= 2.3.5
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.