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Oracle ORDS EUVDEUVD-2026-105775

| CVE-2026-101359 MEDIUM
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-x6v4-phr4-hpr4
5.3
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach exposed ORDS HTTP endpoint
  2. Exploit
    Send crafted HTTP request to Core
  3. Execution
    Bypass authorization checks
  4. Impact
    Perform unauthorized insert/update/delete on accessible data

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 conditions are stated: the vector AV:N/AC:L/PR:N/UI:N indicates remote unauthenticated exploitation over HTTP against a reachable Oracle REST Data Services Core instance running an affected version (24.2.0 through 26.1.0). The primary limiting factor is network reachability - the ORDS HTTP endpoint must be accessible to the attacker (internet-exposed or reachable within the network segment). Impact is further limited to partial integrity: only 'some' ORDS-accessible data can be written (insert/update/delete), with no data disclosure and no service-availability loss. Instances not exposed beyond trusted internal networks, or running versions outside the affected range, are not reachable by this vector.

Impact

This is a medium-severity, integrity-only issue (CVSS 3.1 Base 5.3, vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) rather than a top-tier priority. The CVSS signals are internally consistent: network-reachable (AV:N), low attack complexity (AC:L), no privileges (PR:N), and no user interaction (UI:N), so it is trivially reachable by any unauthenticated HTTP client - but impact is capped at partial integrity (I:L) with NO confidentiality (C:N) and NO availability (A:N) loss, meaning an attacker can perform unauthorized update/insert/delete to SOME accessible data but cannot read data or take the service down. No EPSS score was provided, so exploitation probability cannot be quantified; the CVE is NOT in CISA KEV and no public POC is referenced, so there is no evidence of active exploitation or available exploit code. The 'Authentication Bypass' tag is somewhat broader than the description, which states unauthenticated attackers gain limited write access rather than explicitly confirming an auth-bypass mechanism - treat the tag as indicative, not confirmed. Net: easily exploitable and unauthenticated (which raises urgency for internet-exposed ORDS endpoints), but the limited, integrity-only blast radius keeps this below critical. Patch via the Oracle October 2026 CPU when it reaches you.

Exploit ScenarioDerived

An unauthenticated attacker who can reach an internet- or network-exposed Oracle REST Data Services endpoint sends a crafted HTTP request to the Core component and obtains unauthorized insert/update/delete access to a subset of ORDS-accessible data, without needing credentials or user interaction. No public exploit code or active exploitation has been identified at time of analysis, so this remains a theoretical but low-complexity scenario.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Unauthenticated HTTP access to Oracle REST Data Services Core (Oracle ORDS) versions 24.2.0 through 26.1.0 can allow unauthorized insert, update, or delete operations against some ORDS-accessible data. The CVSS 3.1 score is 5.3 with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N, so the issue is integrity-only, with no confidentiality or availability impact. No public exploit was identified at time of analysis and no CISA KEV confirmation was provided; risk is concentrated on ORDS HTTP endpoints reachable from untrusted networks.

RemediationAI

Patch available per Oracle's CPU advisory at https://www.oracle.com/security-alerts/cpuoct2026.html; the supplied data does not state an exact fixed ORDS version, so verify the CPU-fixed release covering 24.2.0-26.1.0 before upgrading. Until the patch is applied, restrict network access to the ORDS HTTP endpoint to trusted clients or network segments, since AV:N/PR:N/UI:N makes internet or broad internal exposure the main precondition; the trade-off is reduced legitimate API reachability. Monitor ORDS and database logs for unexpected insert, update, or delete activity and disable unused REST endpoints or tighten database privileges where operationally feasible, accepting that these controls may break legitimate integrations if applied too broadly.

Affected VersionsENISA

Oracle REST Data Services 24.2.0 ≤26.1.0

Affected Packages

euvd oracle_rest_data_services no fix

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 is a Java-based middleware layer that exposes Oracle Database resources through HTTP/REST endpoints; the affected component is ORDS Core, and the vulnerable range is 24.2.0 through 26.1.0 as reported by Oracle and EUVD. The supplied CWE field is N/A, so the data does not map the issue to a specific weakness class; the tags include Authentication Bypass, while Oracle's description and the CVSS vector characterize the outcome as unauthenticated modification of some accessible data rather than disclosure or service disruption. Exploitation requires network reachability to the ORDS HTTP service, with AV:N/AC:L/PR:N/UI:N indicating no authentication, no user interaction, and low attack complexity once the endpoint is reachable.

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Severity by source

Vendor (oracle) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI 5.3 MEDIUM

Description confirms unauthenticated network HTTP access (AV:N/AC:L/PR:N/UI:N) with limited unauthorized write access and no read or availability impact (C:N/I:L/A:N).

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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 HTTP 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

EPSS Score
0.3%
Top 79% exploitable
Prevalence
Medium
Common Oracle database middleware but deployed selectively, not in every environment
Data Quality
4 sources
Confidence: Medium

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.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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