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Oracle Purchasing EUVDEUVD-2026-106750

| CVE-2026-91511 HIGH
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-m5wp-q7wg-x2pm
7.1
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
    Obtain low-privileged EBS account
  2. Delivery
    Send crafted HTTP request to Purchasing
  3. Exploit
    Satisfy complex exploitation conditions
  4. Execution
    Cross scope into related products
  5. Impact
    Exfiltrate critical data and alter some records

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

Exploitation targets the Internal Operations component of Oracle Purchasing within Oracle E-Business Suite versions 12.2.3 through 12.2.15, reachable remotely over HTTP. The attacker MUST hold a valid low-privileged account on the EBS instance (CVSS PR:L) - this is not a pre-authentication flaw despite the 'Authentication Bypass' tag. Exploitation is further LIMITED by high attack complexity (AC:H): Oracle characterizes it as 'difficult to exploit,' implying specific conditions or timing beyond a single request must be met. No end-user interaction is required (UI:N). The scope change (S:C) means a successful attack can impact other Oracle products beyond Purchasing, so defenders should assume blast radius extends across the EBS deployment.

Impact

This is a genuinely moderate-priority issue rather than a drop-everything emergency, and the signals are largely consistent. The CVSS 3.1 base score of 7.1 is driven by high confidentiality impact (C:H) and a scope change (S:C), but two metrics temper real-world risk: AC:H (high attack complexity, i.e. Oracle's own 'difficult to exploit' language) and PR:L (the attacker must already hold a low-privileged, authenticated account on the EBS instance). No EPSS score, CISA KEV listing, or public POC is present in the supplied data, so there is no evidence of active or imminent exploitation - consistent with a newly disclosed Oracle Critical Patch Update item. The most important caveat: the input Tags label this 'Authentication Bypass,' which directly conflicts with the CVSS vector's PR:L (an attacker must authenticate). Treat the authentication-bypass characterization as unverified/likely mislabeled and rely on the vector, which indicates a privileged-user escalation/data-exposure flaw, not a pre-auth bypass. Net: real priority for internet-facing EBS 12.2.x deployments where many users hold accounts, but the AC:H + PR:L combination makes mass, trivial exploitation unlikely.

Exploit ScenarioDerived

A low-privileged but authenticated Oracle E-Business Suite user (or an attacker who has phished/obtained such credentials) sends crafted HTTP requests to the Oracle Purchasing 'Internal Operations' component and, after meeting the difficult-to-exploit conditions, reads critical data across a scope boundary into other EBS products. No public exploit code is identified at time of analysis, and the high attack complexity means exploitation requires specific conditions rather than a single trivial request.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Unauthorized read of critical Oracle Purchasing data, plus limited insert/update/delete capability, is achievable by a low-privileged authenticated user of Oracle E-Business Suite 12.2.3 through 12.2.15 who can reach the Internal Operations component over HTTP and satisfy non-trivial preconditions (high attack complexity). Scope is changed, so a successful attack can ripple into other Oracle products sharing the EBS deployment rather than staying confined to Purchasing. No public exploit code has been identified at time of analysis and the issue is not known to be actively exploited, which keeps it a moderate-priority patching item worked through the normal Critical Patch Update cycle rather than an emergency.

RemediationAI

Apply the Oracle Critical Patch Update referenced at https://www.oracle.com/security-alerts/cpuoct2026.html; the input data does not state an exact minimum patched version, so confirm the required 12.2.x patch level and any prerequisite patches directly from that advisory before upgrading, then deploy through the standard EBS online patching (adop) cycle across the application tier and any dependent products implicated by the scope change, testing in a non-production clone first. Because the flaw requires only a low-privileged account and the exploit conditions are difficult but not impossible, interim controls should focus on shrinking the exposure surface: restrict HTTP access to the EBS application tier to trusted networks or VPN and front it with a reverse proxy allow-list (trade-off: legitimate remote procurement users lose direct access), and audit then remove unused Purchasing responsibilities and dormant low-privileged accounts (trade-off: re-provisioning effort and possible workflow disruption for staff who genuinely need the role). Given the Scope Changed rating, extend logging and review of cross-module data access by Purchasing users during the pre-patch window, as suspicious activity may appear outside Purchasing itself.

Affected VersionsENISA

Oracle Purchasing 12.2.3 ≤12.2.15

Affected Packages

euvd oracle_purchasing 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 E-Business Suite is a large integrated ERP platform, and Oracle Purchasing is its procurement module; 'Internal Operations' is the affected internal component exposed through the application tier's HTTP interface. No CWE is assigned in the available data, but the behavior described is an authorization/access-control weakness rather than a credential flaw: an attacker holding any valid low-privileged EBS account can exceed their intended permission boundary, which is exactly what the CVSS vector (PR:L) indicates. The 'Authentication Bypass' tag carried on the record is therefore misleading and should not be read as a pre-auth condition. Attack complexity is High (AC:H), meaning exploitation depends on specific application state, sequencing, or configuration beyond a single crafted request, and the Scope Changed (S:C) rating reflects that privileges obtained in Purchasing can be leveraged against resources outside that component, widening the blast radius across the EBS instance. Confidentiality impact is High and Integrity impact is Low, with no availability impact.

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Severity by source

Vendor (oracle) PRIMARY 7.1 HIGH
AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
vuln.today AI 7.1 HIGH

Remote HTTP (AV:N) but vendor-stated difficult to exploit (AC:H) by an authenticated low-privileged user (PR:L); scope change (S:C) with high confidentiality, limited integrity, no availability impact.

3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
4.0 AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

DescriptionCVE.org

Vulnerability in the Oracle Purchasing product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Purchasing. While the vulnerability is in Oracle Purchasing, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Purchasing accessible data as well as unauthorized update, insert or delete access to some of Oracle Purchasing accessible data. CVSS 3.1 Base Score 7.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N).

Executive ViewAI

Why It Matters

Oracle E-Business Suite 12.2.3 through 12.2.15 can expose critical Purchasing data to unauthorized read and limited write through the Internal Operations component over HTTP, with changed scope that can affect other Oracle products in the same deployment. Leadership should care because procurement and financial records could be exposed or altered, and no vendor-released patch is currently available, even though exploitation requires high complexity and no public exploit identified at time of analysis. Treat this as a moderate-priority item for the normal Critical Patch Update cycle while reducing exposure.

Business Impact: Medium
Compensating Controls

No vendor-released patch identified at time of analysis; restrict network access to the Internal Operations component over HTTP to trusted hosts, enforce least privilege and review accounts with Purchasing access, monitor for anomalous reads or writes to Purchasing data, and apply the vendor patch when released.

Threat Intelligence Overview

EPSS Score
0.2%
Top 86% exploitable
Prevalence
Medium
Major enterprise ERP suite, common in large orgs but not universal
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 HIGH
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
No
Human Impact
Medium

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
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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