Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessIdentify network-accessible ORDS instance
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DeliverySend crafted unauthenticated HTTPS request to Core endpoint
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ExploitBypass authentication check in Core component
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ExecutionIssue unauthorized DML operation (INSERT/UPDATE/DELETE)
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ImpactCorrupt or inject data in REST-enabled Oracle schema
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | No special configuration is required beyond having an ORDS instance running versions 24.2.0 through 26.1.0 accessible over HTTPS. The CVSS vector PR:N/AC:L/AV:N confirms unauthenticated network exploitation against default-accessible deployments. Exploitation is limited to data integrity operations (INSERT, UPDATE, DELETE) on 'some' ORDS-accessible data - the scope of writable objects depends on which schemas and tables have been REST-enabled. Confidentiality is not impacted (no data read), and availability is not impacted (no denial of service). Exploitation is further constrained to the subset of REST endpoints that perform write operations; read-only GET endpoints are not a vector. The attack must be conducted over HTTPS (not HTTP), which narrows exploitation to TLS-capable network paths but does not require any special access or credentials. |
| Impact | The CVSS 3.1 base score of 5.3 (Medium) is supported by a vector of AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. The attack vector is network, complexity is low, no privileges are required, and no user interaction is needed - all of which elevate real-world exploitability. However, the impact is constrained: only Integrity is affected at a Low level (I:L), with no Confidentiality or Availability impact. This means an attacker can corrupt or insert data but cannot read sensitive data or cause service disruption. No EPSS score was provided in the source data, which limits probabilistic exploitation forecasting. There is no KEV listing and no confirmed public exploit code, meaning exploitation remains theoretical at time of analysis. Despite the low CVSS score, organizations with internet-facing ORDS deployments or those where ORDS mediates write access to critical database tables should treat this as a meaningful priority, since authentication bypass enabling unauthorized writes can be chained with other weaknesses to escalate impact. The 'easily exploitable' descriptor in the Oracle advisory aligns with the low-complexity, no-privilege CVSS vector and warrants prompt patching despite the moderate score. |
| Exploit ScenarioDerived | An unauthenticated attacker with network access to an ORDS 24.2.0-26.1.0 instance sends a crafted HTTPS request to a REST-enabled database endpoint, exploiting the authentication bypass in the Core component to skip credential validation. The attacker then issues INSERT, UPDATE, or DELETE operations against accessible ORDS-exposed database objects, potentially corrupting application data or injecting malicious records. No public proof-of-concept code has been identified at time of analysis, but the low attack complexity suggests this is reproducible with minimal effort by a moderately skilled attacker. |
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Alert meAnalysisAIv1 – May 28, 2026
Unauthenticated network-based data integrity compromise in Oracle REST Data Services (ORDS) versions 24.2.0 through 26.1.0 allows remote attackers to perform unauthorized insert, update, or delete operations against accessible ORDS data via HTTPS. The vulnerability resides in the Core component and is classified as an Authentication Bypass, meaning the access control enforcement in ORDS's request pipeline can be circumvented without credentials. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, though the CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates the exploit path is straightforward for any network-adjacent attacker.
RemediationAI
Apply the patch provided in Oracle's Critical Patch Update (CPU) for May 2026, available at https://www.oracle.com/security-alerts/cspumay2026.html. Oracle CPU advisories typically include updated ORDS release packages; administrators should consult the advisory for the exact patched version number, as no specific fix version was enumerated in the available data. As a compensating control prior to patching, consider restricting network access to ORDS endpoints using perimeter firewall rules or reverse proxy access controls to limit exposure to trusted IP ranges only - note that this does not fix the underlying bypass but reduces the attacker pool. Additionally, review ORDS REST-enabled schemas and consider temporarily disabling write-capable REST endpoints (AutoREST or explicitly defined POST/PUT/DELETE handlers) on non-essential objects until the patch is applied; this limits the blast radius of unauthorized write operations at the cost of reduced API functionality.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Oracle REST Data Services (ORDS) is Oracle's RESTful web service layer that exposes Oracle Database objects - tables, views, stored procedures - over HTTP/HTTPS. It is commonly deployed to enable database access for web applications, mobile clients, and API consumers. The affected component is 'Core,' which governs the fundamental request-handling and authentication enforcement pipeline. The vulnerability tag 'Authentication Bypass' indicates that the Core component fails to properly enforce authentication checks under certain conditions, allowing unauthenticated HTTP requests to perform data-modifying operations (DML: INSERT, UPDATE, DELETE). The CPE cpe:2.3:a:oracle_corporation:oracle_rest_data_services:*:*:*:*:*:*:*:* covers all subversions in the affected range 24.2.0-26.1.0. CWE is listed as N/A by the reporter, which limits root-cause classification; however, the Authentication Bypass tag is consistent with CWE-287 (Improper Authentication) or CWE-306 (Missing Authentication for Critical Function).
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Primary rating from Vendor (oracle) · only source for this CVE.
CVSS VectorVendor: oracle
DescriptionCVE.org
Vulnerability in Oracle REST Data Services (component: Core). 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. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle REST Data Services accessible data. CVSS 3.1 Base Score 5.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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NVD
CVE.org
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