Affects widely used Nginx UI; unauthenticated MCP access enables full control and takeover.
CVE-2026-33032
Critical unauthenticated MCP endpoint in nginx-ui enables full Nginx takeover.
Is CVE-2026-33032 being exploited?
Not confirmed. CVE-2026-33032 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 36% probability of exploitation in the next 30 days.
How severe is CVE-2026-33032?
CVE-2026-33032 is rated Critical with a CVSS score of 9.8. 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-2026-33032?
Yes. A fix has been recorded for CVE-2026-33032. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33032 affect?
CVE-2026-33032 affects nginx-ui <= 2.3.5, Nginx UI MCP endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33032?
Monitor; restrict MCP access; patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated access to MCP endpoint allows remote control of Nginx (restart, config changes, reloads) and complete service takeover.
Monitor only
- 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.