CVE-2026-83490: Oracle iRecruitment Auth Bypass Vulnerability

CVE-2026-83490 Overview

CVE-2026-83490 is a high-severity vulnerability in the Oracle iRecruitment product of Oracle E-Business Suite, within the Internal Operations component. The flaw affects supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access over HTTP can exploit the issue without user interaction. The vulnerability carries a scope change, meaning successful exploitation can impact resources beyond the vulnerable component. Attackers can gain unauthorized access to critical Oracle iRecruitment data and perform unauthorized inserts, updates, or deletes on a subset of that data.

Critical Impact
Low-privileged network attackers can compromise Oracle iRecruitment, gaining complete read access to accessible data and partial write access, with scope change extending impact to additional Oracle E-Business Suite products.

Affected Products

Oracle E-Business Suite — Oracle iRecruitment 12.2.3
Oracle E-Business Suite — Oracle iRecruitment versions 12.2.4 through 12.2.14
Oracle E-Business Suite — Oracle iRecruitment 12.2.15

Discovery Timeline

2026-09-15 - CVE-2026-83490 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-83490

Vulnerability Analysis

The vulnerability resides in the Internal Operations component of Oracle iRecruitment, a candidate management module within Oracle E-Business Suite. Attackers reach the flaw over HTTP with only low authenticated privileges, which lowers the barrier to exploitation in environments where broad application access is granted to internal users or contractors.

The scope change property is significant. It indicates the vulnerable component operates in a security context that differs from the resources it can affect after exploitation. In practice, this means attacks originating in Oracle iRecruitment can reach data and operations belonging to other Oracle E-Business Suite modules that share the underlying application server, database schemas, or authentication context.

Successful exploitation yields high confidentiality impact and limited integrity impact. Attackers can read all data accessible to Oracle iRecruitment and modify a subset of that data. Availability is not affected, which suggests the flaw supports silent data theft and targeted data tampering rather than service disruption.

Root Cause

Oracle has not published root cause details. The Oracle Critical Patch Update advisory categorizes the issue as easily exploitable and scoped to the Internal Operations component. No CWE identifier has been assigned in the NVD entry. Consult the Oracle Security Alert CSPUSEP2026 for vendor-supplied technical context.

Attack Vector

Exploitation occurs remotely over HTTP against the Oracle iRecruitment interface. The attacker requires low-level authenticated access, which many Oracle iRecruitment deployments grant to internal HR staff, applicants, or delegated recruiters. No user interaction is required to trigger the vulnerability. Because the attack traverses a scope boundary, the effective blast radius extends beyond the iRecruitment module.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability is 0.316%.

Detection Methods for CVE-2026-83490

Indicators of Compromise

Unexpected HTTP requests to Oracle iRecruitment endpoints originating from low-privileged accounts, especially requests carrying unusual parameters targeting Internal Operations functions.
Database audit records showing SELECT, INSERT, UPDATE, or DELETE activity against Oracle iRecruitment tables performed by application accounts outside normal business hours.
Cross-module data access patterns where an iRecruitment session accesses resources belonging to other Oracle E-Business Suite products.

Detection Strategies

Enable Oracle E-Business Suite Sign-On Audit and Page Access Tracking to correlate low-privileged user sessions with sensitive Internal Operations pages.
Monitor Oracle Database fine-grained auditing (FGA) policies on iRecruitment schema objects for anomalous read volumes and write operations tied to non-administrative accounts.
Correlate web tier access logs with application-layer session identifiers to identify session reuse or parameter tampering against iRecruitment URLs.

Monitoring Recommendations

Forward Oracle E-Business Suite application logs, Oracle HTTP Server access logs, and database audit trails to a centralized analytics platform for cross-source correlation.
Baseline normal iRecruitment usage per user role and alert on statistical deviations in request volume, endpoint diversity, or off-hours activity.
Track privileged operations that follow low-privileged authentication events within the same session, which may indicate scope-change exploitation.

How to Mitigate CVE-2026-83490

Immediate Actions Required

Apply the patches provided in the Oracle Security Alert CSPUSEP2026 to all Oracle E-Business Suite environments running versions 12.2.3 through 12.2.15.
Inventory all Oracle iRecruitment deployments and prioritize internet-facing instances, which represent the highest exposure to remote HTTP-based exploitation.
Audit Oracle iRecruitment user accounts and remove or restrict low-privileged accounts that no longer require access.

Patch Information

Oracle addressed CVE-2026-83490 in the Oracle Security Alert CSPUSEP2026. Administrators should download and apply the corresponding patch for their Oracle E-Business Suite release from My Oracle Support. Refer to the Oracle Security Alert CSPUSEP2026 for patch identifiers and installation prerequisites.

Workarounds

Restrict network access to Oracle iRecruitment endpoints using a web application firewall or reverse proxy allow list where full patching cannot be completed immediately.
Disable or unregister the iRecruitment module from Oracle E-Business Suite in environments where the functionality is not actively used.
Enforce multi-factor authentication and strong session controls on all Oracle E-Business Suite user accounts to reduce the likelihood of low-privileged account compromise.

bash

# Configuration example: restrict access to Oracle iRecruitment URLs
# at the Oracle HTTP Server tier until patching is complete
<Location /OA_HTML/OA.jsp>
    Order deny,allow
    Deny from all
    Allow from 10.0.0.0/8
    Allow from 192.168.0.0/16
</Location>