CVE-2026-46991: Oracle Enterprise Manager Auth Bypass Flaw

CVE-2026-46991 Overview

CVE-2026-46991 affects the Oracle Enterprise Manager Base Platform, specifically the Enterprise Config Management component. Supported versions 13.5 and 24.1 contain an improper access control weakness [CWE-284]. A low-privileged attacker with logon access to the infrastructure where Oracle Enterprise Manager Base Platform executes can exploit this flaw locally. Successful exploitation grants unauthorized update, insert, or delete access to some accessible data and unauthorized read access to a subset of data. Oracle addressed the issue in the Oracle July 2026 Security Alert.

Critical Impact
Authenticated local attackers can modify and read a subset of Oracle Enterprise Manager Base Platform data, undermining configuration integrity and confidentiality.

Affected Products

Oracle Enterprise Manager Base Platform 13.5
Oracle Enterprise Manager Base Platform 24.1
Enterprise Config Management component

Discovery Timeline

2026-07-21 - CVE-2026-46991 published to NVD as part of Oracle's Critical Patch Update
2026-07-23 - Last updated in NVD database

Technical Details for CVE-2026-46991

Vulnerability Analysis

The vulnerability resides in the Enterprise Config Management component of Oracle Enterprise Manager Base Platform. This component manages configuration data across enterprise infrastructure. An improper access control condition allows an authenticated local user to perform actions beyond their assigned privilege level. The flaw yields limited write and read access to platform-managed data. Attack complexity is low, meaning no specialized conditions are required beyond authenticated local access. The scope remains unchanged, so impact is confined to the vulnerable component's security authority.

Root Cause

The underlying defect maps to [CWE-284] Improper Access Control. The Enterprise Config Management component does not sufficiently enforce authorization checks on operations exposed to low-privileged users. When these users invoke affected functions, the platform permits data modification and read operations that should require higher privileges.

Attack Vector

Exploitation requires local access with valid credentials to the host running Oracle Enterprise Manager Base Platform. The attacker does not need user interaction. After authenticating with a low-privileged account, the adversary invokes affected Enterprise Config Management functionality to insert, update, or delete configuration data and read a subset of accessible records. No public proof-of-concept code or exploit is currently available. Refer to the Oracle July 2026 Security Alert for vendor-supplied technical context.

Detection Methods for CVE-2026-46991

Indicators of Compromise

Unexpected modifications to Enterprise Config Management records performed by low-privileged accounts.
Anomalous read operations against configuration tables by users outside administrative roles.
Audit log entries showing configuration insert, update, or delete actions inconsistent with change management records.

Detection Strategies

Enable and centralize Oracle Enterprise Manager audit logging, focusing on Enterprise Config Management activities.
Correlate authentication events with configuration change events to identify low-privileged accounts performing privileged operations.
Baseline normal configuration change patterns and alert on deviations, particularly outside maintenance windows.

Monitoring Recommendations

Forward Oracle Enterprise Manager audit and listener logs to a centralized SIEM or data lake for retention and correlation.
Monitor operating system login events on hosts running Oracle Enterprise Manager Base Platform to identify unexpected local sessions.
Track privilege usage on service accounts associated with Enterprise Config Management and alert on drift from established baselines.

How to Mitigate CVE-2026-46991

Immediate Actions Required

Apply the patches described in the Oracle July 2026 Critical Patch Update to Oracle Enterprise Manager Base Platform 13.5 and 24.1.
Review and reduce the population of accounts with logon access to hosts running Oracle Enterprise Manager Base Platform.
Audit recent Enterprise Config Management activity for unauthorized inserts, updates, deletes, or reads.

Patch Information

Oracle released fixes for CVE-2026-46991 in the July 2026 Critical Patch Update. Administrators should download and apply the relevant patches for Oracle Enterprise Manager Base Platform versions 13.5 and 24.1 as documented in the Oracle July 2026 Security Alert.

Workarounds

Restrict local logon rights on Oracle Enterprise Manager Base Platform hosts to a minimal set of administrators until patches are applied.
Enforce least-privilege role assignments within Oracle Enterprise Manager and remove unnecessary Enterprise Config Management permissions from standard users.
Enable verbose auditing on the Enterprise Config Management component to increase detection coverage while remediation is pending.

bash

# Configuration example
# Review current Oracle Enterprise Manager patch inventory before applying the July 2026 CPU
$ORACLE_HOME/OPatch/opatch lsinventory

# Apply the Oracle July 2026 Critical Patch Update per Oracle's documented procedure
$ORACLE_HOME/OPatch/opatch apply <PATCH_DIRECTORY>