CVE-2026-46840
Published: 28 May 2026
Summary
CVE-2026-46840 is a critical-severity Improper Access Control (CWE-284) vulnerability in Oracle Rest Data Services. Its CVSS base score is 10.0 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 49.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-33018
Vulnerability details
Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle REST Data Services. While the vulnerability is in Oracle REST Data…
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Services, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle REST Data Services. CVSS 3.1 Base Score 10.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated remote network exploit of public-facing Oracle REST Data Services enabling full service takeover directly matches T1190.
CVEs Like This One
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Provides capability to review session content, directly detecting violations of access control.
Control assessments verify that access controls are implemented correctly and operating as intended, detecting improper access control before exploitation.
Identity providers centralize and enforce authentication mechanisms, reducing improper authentication.
Approving and monitoring nonlocal maintenance per policy enforces access control over remote diagnostic activities.
Architectures explicitly define requirements and mechanisms for access control to protect confidentiality, integrity, and availability.
The policy establishes consistent rules for granting, reviewing, and revoking access based on personnel status, tangibly limiting improper access control.
Risk assessment explicitly identifies threats from unauthorized access and drives decisions to implement or strengthen access control mechanisms.
Explicit training on access control mechanisms and their operation makes improper access control harder to introduce via misconfiguration.