What is the CVSS score of CVE-2026-71106?

CVE-2026-71106 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Which versions of Oracle Hospitality OPERA 5 are affected by CVE-2026-71106?

Oracle Hospitality OPERA 5 Property Services (versions 5.6.28.0-5.6.28.1) is vulnerable to remote unauthenticated compromise via the Opera Servlet HTTP component.

How to fix or mitigate CVE-2026-71106?

Within 24 hours: Inventory all systems running OPERA 5.6.28.0-5.6.28.1, verify current network isolation status, contact Oracle directly for patch timeline, and activate incident response team readiness. Within 7 days: Implement network segmentation and access controls to isolate OPERA systems from untrusted networks; deploy web application firewall rules restricting HTTP access to the OPERA Servlet component to known-legitimate sources only. Within 30 days: Develop and execute upgrade path to a patched OPERA 5 version once vendor releases a fix; prioritize this above other IT projects given the lack of interim remediation.

Oracle Hospitality OPERA 5 CVE-2026-71106

EUVD-2026-62049 HIGH

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-4q2v-pgf7-p9wv

Authentication Bypass Oracle Hospitality Opera 5 Property Services

8.8

CVSS 3.1 · Vendor: oracle

Severity by source

Vendor (oracle) PRIMARY

8.8 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

vuln.today AI

8.8 HIGH

Network-accessible HTTP servlet, no auth required, but victim interaction mandatory; full CIA impact consistent with system takeover outcome described by Oracle.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Aug 18, 2026 - 22:30 vuln.today

CVE Published

Aug 18, 2026 - 21:18 nvd

HIGH 8.8

DescriptionCVE.org

Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera Servlet). Supported versions that are affected are 5.6.28.0-5.6.28.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5 Property Services. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Hospitality OPERA 5 Property Services. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

AnalysisAI

Remote unauthenticated takeover of Oracle Hospitality OPERA 5 Property Services (Opera Servlet component) is possible in versions 5.6.28.0 through 5.6.28.1 via HTTP, with an attacker requiring no privileges and only low attack complexity. The UI:R CVSS metric indicates exploitation depends on human interaction from a non-attacker party, consistent with client-side injection or CSRF-style attack patterns targeting hotel staff sessions. …

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Vulnerability AssessmentAI

Exploitation	The attacker must reach the Oracle Hospitality OPERA 5 web interface over HTTP via a network path (AV:N), which in many hotel deployments means the PMS is either intranet-only or, in some configurations, internet-facing. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 base score of 8.8 with vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H reflects a high-severity, network-accessible vulnerability with no authentication requirement and low complexity, offset only by the need for human interaction (UI:R). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation	The primary remediation is to apply Oracle's Critical Security Patch Update for August 2026, available via the Oracle advisory at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all systems running OPERA 5.6.28.0-5.6.28.1, verify current network isolation status, contact Oracle directly for patch timeline, and activate incident response team readiness. …

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