How severe is CVE-2026-34311?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Oracle Hospitality_opera_5_property_services

CVE-2026-34311

Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Supported versions that are affected are 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6 and 5.6.28. Easily exploitab…

EPSS: 0.002 (36.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Oracle Hospitality_opera_5_property_services — versions 5.6.19.24, 5.6.22, 5.6.25.19
Oracle Corporation Hospitality Opera 5 Property Services — versions 5.6.19.24, 5.6.22, 5.6.25.19

References

secalert_us@oracle.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34311?: CVE-2026-34311 is a critical-severity vulnerability in Oracle Hospitality_opera_5_property_services. CVSS score: 9.8/10. Published 2026-05-28.
How severe is CVE-2026-34311?: Critical severity. CVSS v3 base score is 9.8 out of 10.