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Cyber Security Agency of Singapore
Alerts

Multiple Critical Vulnerabilities in Oracle Products

3 June 2026

Oracle has released security updates to address multiple vulnerabilities across several Oracle products that could allow unauthenticated attackers to compromise and take over affected systems. Users and administrators of affected products are advised to update to the latest versions immediately.

Background

Oracle has released security updates to address multiple vulnerabilities affecting Oracle REST Data Services, Oracle E-Business Suite, Oracle Communications Unified Assurance, Oracle Database Server, and Oracle Hospitality OPERA 5 Property Services in its monthly advisory.

The following vulnerabilities have a Common Vulnerability Scoring System (CVSS v3.1) score of: CVE-2026-46840 at 10.0, CVE-2026-46817 and CVE-2026-34311 at 9.8, CVE-2026-2332 and CVE-2026-33557 and CVE-2026-46819 at 9.1, and CVE-2026-46833 at 9.0, out of 10.

Impact

Successful exploitation of these vulnerabilities could lead to the following:

  • CVE-2026-46840: Due to a vulnerability in the Backend-as-a-Service component of Oracle REST Data Services, an unauthenticated attacker could compromise and take over the affected system, with potential impact on additional connected products.

  • CVE-2026-46817: Due to a vulnerability in the File Transmission component of Oracle Payments, an unauthenticated attacker could take over the affected Oracle Payments system.

  • CVE-2026-2332: Due to a vulnerability in the Core component of Oracle REST Data Services, an unauthenticated attacker could gain unauthorised creation, deletion, modification, and read access to critical data on the affected system.

  • CVE-2026-33557: Due to a vulnerability in the Message Bus component of Oracle Communications Unified Assurance, an unauthenticated attacker could gain unauthorised creation, deletion, modification, and read access to critical data on the affected system.

  • CVE-2026-46819: Due to a vulnerability in the Internal Operations component of Oracle Internet Procurement Connector, an unauthenticated attacker could gain unauthorised creation, deletion, modification, and read access to critical data on the affected system.

  • CVE-2026-46833: Due to a vulnerability in the Net Service component of Oracle Database Server, an unauthenticated attacker could compromise and take over the affected Net Service, with potential impact on additional connected products.

  • CVE-2026-34311: Due to a vulnerability in Oracle Hospitality OPERA 5 Property Services, an unauthenticated attacker could take over the affected system.

Affected Products

These vulnerabilities affect the following Oracle products and versions:

  • CVE-2026-46840 (Oracle REST Data Services — Backend-as-a-Service): versions 24.2.0 through 26.1.0

  • CVE-2026-46817 (Oracle E-Business Suite — Oracle Payments): versions 12.2.3 through 12.2.15

  • CVE-2026-2332 (Oracle REST Data Services — Core): versions 24.2.0 through 26.1.0

  • CVE-2026-33557 (Oracle Communications Unified Assurance — Message Bus): versions 6.1.1 through 7.0.0

  • CVE-2026-46819 (Oracle E-Business Suite — Oracle Internet Procurement Connector): versions 12.2.3 through 12.2.15

  • CVE-2026-46833 (Oracle Database Server — Net Service): versions 23.4.0 through 23.26.2

  • CVE-2026-34311 (Oracle Hospitality OPERA 5 Property Services): versions 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6, and 5.6.28

Mitigation

Users and administrators of affected products are advised to update to the latest versions immediately.

References

https://www.oracle.com/security-alerts/cspumay2026.html

https://www.oracle.com/security-alerts/cspumay2026verbose.html

https://nvd.nist.gov/vuln/detail/CVE-2026-46840

https://nvd.nist.gov/vuln/detail/CVE-2026-46817

https://nvd.nist.gov/vuln/detail/CVE-2026-2332

https://nvd.nist.gov/vuln/detail/CVE-2026-33557

https://nvd.nist.gov/vuln/detail/CVE-2026-46819

https://nvd.nist.gov/vuln/detail/CVE-2026-46833

https://nvd.nist.gov/vuln/detail/CVE-2026-34311

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