Critical severity · published May 28, 2026
CVE-2026-34311
Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera)
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
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 exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5 Property Services. Successful attacks of this vulnerability can result in takeover of Oracle Hospitality OPERA 5 Property Services. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OH
Oracle Hospitality OPERA 5 Property Services · Oracle Corporation
5.6.19.24; 5.6.22; 5.6.25.19; 5.6.27.6; 5.6.28 · source: vendor
HO
Hospitality Opera 5 Property Services · Oracle
5.6.19.24; 5.6.22; 5.6.25.19; 5.6.27.6; 5.6.28 · source: NVD
Affected product
OH
Oracle Hospitality OPERA 5 Property Services
Oracle Corporation
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