Oracle REST Data Services <=26.2.1 GraphQL Auth Bypass - unauthorized data access
CVE-2026-91609 Published on October 20, 2026
Vulnerability in Oracle REST Data Services (component: Graph QL). Supported versions that are affected are 24.2.0-26.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle REST Data Services. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle REST Data Services accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
Vulnerability Analysis
CVE-2026-91609 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2026-91609 has been classified to as an Information Disclosure vulnerability or weakness.
Products Associated with CVE-2026-91609
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Affected Versions
Oracle Corporation Oracle REST Data Services:- Version 24.2.0, <= 26.2.1 is affected.