CVE-2026-53453
Authenticated non-admins can access admin backend in Home Assistant Blueprint Studio.
Is CVE-2026-53453 being exploited?
Not confirmed. CVE-2026-53453 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-2026-53453?
CVE-2026-53453 is rated High with a CVSS score of 8.7. 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-2026-53453?
Yes. A fix has been recorded for CVE-2026-53453. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-53453 affect?
CVE-2026-53453 affects Home Assistant (Blueprint Studio) <2.5.2, Home Assistant instances with Blueprint Studio enabled, Backend API, upload API, terminal/WebSocket routes. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53453?
Upgrade Blueprint Studio to 2.5.2 immediately; restrict access and audit configs/secrets.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated non-admin users can invoke arbitrary services, read/modify configs, upload/download files, access terminal/streams — risk of RCE/full compromise.
Immediate action required
- affected< 2.5.2
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.