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 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).

Published: 2026-05-28 Last update: 2026-05-29 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-34311 is rated Moderate Risk (52/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.16%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-34311

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-03 0.12% 0.16% +0.04%
2 2026-05-30 0.04% 0.12% +0.08%
3 2026-05-29 — 0.04% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-34311

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2026-34311

GitHub Security Advisory for CVE-2026-34311

GHSA-g89r-3vv2-wxjx · Severity: critical — Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality...

Affected software / configurations for CVE-2026-34311

Vendor Product Version Raw CPE
oracle hospitality_opera_5_property_services 5.6.19.24 cpe:2.3:a:oracle:hospitality_opera_5_property_services:5.6.19.24:*:*:*:*:*:*:*
oracle hospitality_opera_5_property_services 5.6.22 cpe:2.3:a:oracle:hospitality_opera_5_property_services:5.6.22:*:*:*:*:*:*:*
oracle hospitality_opera_5_property_services 5.6.25.19 cpe:2.3:a:oracle:hospitality_opera_5_property_services:5.6.25.19:*:*:*:*:*:*:*
oracle hospitality_opera_5_property_services 5.6.27.6 cpe:2.3:a:oracle:hospitality_opera_5_property_services:5.6.27.6:*:*:*:*:*:*:*
oracle hospitality_opera_5_property_services 5.6.28 cpe:2.3:a:oracle:hospitality_opera_5_property_services:5.6.28:*:*:*:*:*:*:*

References for CVE-2026-34311

cvelogic Threat Intelligence