CVE-2026-39764
Unauthenticated SQL injection in Radius Booking WordPress plugin <=1.0.19
Is CVE-2026-39764 being exploited?
Not confirmed. CVE-2026-39764 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 0.30% probability of exploitation in the next 30 days.
How severe is CVE-2026-39764?
CVE-2026-39764 is rated Critical with a CVSS score of 9.3. 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-2026-39764?
Not known from our data. No patch reference has been recorded for CVE-2026-39764, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-39764 affect?
CVE-2026-39764 affects Radius Booking — Booking Calendar for Appointments & Services WordPress plugin <= 1.0.19, WordPress sites running the vulnerable plugin. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39764?
Disable/remove plugin or isolate affected sites; apply WAF rules; patch when vendor publishes fix
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated SQL injection allowing attackers to read/modify DB, exfiltrate data, and potentially escalate to site admin control.
Immediate action required
- affected<= 1.0.19
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.