CVE-2026-46858 Overview
CVE-2026-46858 is a critical access control vulnerability [CWE-284] in the APM - Application Performance Management product of Oracle Enterprise Manager. The flaw resides in the JADM, JVM Diagnostics component and affects supported versions 13.5 and 24.1. Unauthenticated attackers with network access via HTTP can exploit the vulnerability without user interaction. Successful exploitation grants unauthorized creation, deletion, or modification of critical APM data and can trigger a complete denial of service through hangs or repeatable crashes. Oracle published the security alert in June 2026.
Critical Impact
Remote, unauthenticated attackers can modify or destroy APM data and cause complete denial of service against Oracle Enterprise Manager APM deployments.
Affected Products
- Oracle Enterprise Manager APM - Application Performance Management 13.5
- Oracle Enterprise Manager APM - Application Performance Management 24.1
- JADM, JVM Diagnostics component
Discovery Timeline
- 2026-06-17 - CVE-2026-46858 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-46858
Vulnerability Analysis
The vulnerability stems from improper access control [CWE-284] in the JVM Diagnostics (JADM) component of Oracle Enterprise Manager APM. The component exposes functionality over HTTP without enforcing authentication or authorization checks on sensitive operations. Attackers can reach the affected endpoints across the network and invoke privileged actions directly.
Successful exploitation produces two distinct outcomes. First, attackers gain unauthorized write access to all APM-accessible data, allowing them to create, delete, or modify records that drive application monitoring and diagnostics. Second, attackers can place the APM service into a hung or crash-looping state, producing a complete denial of service. Confidentiality is not impacted, but integrity and availability are fully compromised. The EPSS probability is 0.437% with a percentile of 34.796.
Root Cause
The root cause is missing or insufficient access control enforcement on JADM HTTP interfaces. The component does not validate caller identity or permissions before processing requests that modify diagnostic data or consume backend resources.
Attack Vector
The attack vector is network-based over HTTP. An attacker only requires reachability to the Enterprise Manager APM service on its listening port. No credentials, prior foothold, or user interaction are required, which makes internet-exposed or broadly-reachable internal deployments equally at risk.
No public proof-of-concept code or verified exploitation samples are available. See the Oracle Security Alert for vendor-supplied technical details.
Detection Methods for CVE-2026-46858
Indicators of Compromise
- Unexpected creation, deletion, or modification of APM monitoring targets, agents, or diagnostic configurations
- Repeated APM service crashes, JVM hangs, or restart loops in Enterprise Manager logs
- HTTP requests to JADM/JVM Diagnostics endpoints from untrusted source IP addresses
- Anomalous spikes in HTTP traffic targeting Enterprise Manager APM listeners
Detection Strategies
- Inspect Oracle Enterprise Manager audit logs for unauthenticated or unexpected administrative operations against APM objects
- Correlate web access logs against APM service availability events to identify request patterns preceding crashes
- Alert on HTTP requests to JADM URLs originating from outside the management network segment
Monitoring Recommendations
- Monitor Enterprise Manager APM service health, JVM uptime, and crash frequency for sudden degradation
- Forward Enterprise Manager and web tier logs to a centralized SIEM with retention covering the patch deployment window
- Track integrity of APM configuration tables and diagnostic snapshots through file integrity and database change monitoring
How to Mitigate CVE-2026-46858
Immediate Actions Required
- Apply the Oracle Critical Patch Update referenced in the June 2026 security alert to all affected Enterprise Manager APM 13.5 and 24.1 deployments
- Restrict network access to APM HTTP listeners so that only authorized management hosts can reach the service
- Review APM audit and change history for unauthorized modifications since the affected versions were deployed
- Inventory all Enterprise Manager APM instances and confirm version levels against the vendor advisory
Patch Information
Oracle has released fixes through its Critical Patch Update program. Refer to the Oracle Security Alert for patch identifiers, installation prerequisites, and post-installation validation steps for Enterprise Manager APM 13.5 and 24.1.
Workarounds
- Place Enterprise Manager APM behind a reverse proxy or web application firewall that enforces authentication on JADM paths
- Block external network access to APM HTTP ports using firewall or network ACL rules until patching completes
- Segment Enterprise Manager management infrastructure into a dedicated VLAN with strict ingress filtering
# Example: restrict APM HTTP access to a trusted management subnet
iptables -A INPUT -p tcp --dport 7799 -s 10.10.50.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 7799 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
