CVE-2026-83414 Overview
CVE-2026-83414 is an information disclosure vulnerability in the Oracle Coherence product of Oracle Fusion Middleware, specifically within the Core component. The affected supported version is 15.1.1.0.0. A low-privileged attacker with logon access to the infrastructure where Oracle Coherence executes can exploit this flaw to read a subset of Coherence-accessible data. The vulnerability is difficult to exploit and requires local access, which limits its exposure to authenticated users on the host. No integrity or availability impact results from successful exploitation.
Critical Impact
Successful exploitation grants unauthorized read access to a subset of Oracle Coherence data. The attack requires local access and low-level privileges on the infrastructure hosting Coherence.
Affected Products
- Oracle Fusion Middleware
- Oracle Coherence (Core component)
- Oracle Coherence version 15.1.1.0.0
Discovery Timeline
- 2026-09-15 - CVE CVE-2026-83414 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-83414
Vulnerability Analysis
The vulnerability resides in the Core component of Oracle Coherence, a distributed in-memory data grid used within Oracle Fusion Middleware deployments. An authenticated user with local access to the host running Coherence can leverage the flaw to obtain unauthorized read access to a subset of data accessible through Coherence. The scope is unchanged, meaning exploitation does not extend to resources beyond the vulnerable component itself. Only confidentiality is affected; integrity and availability remain intact after exploitation. Consult the Oracle Security Alert CSPU Sep 2026 for authoritative vendor detail.
Root Cause
Oracle has not published a public root-cause analysis for CVE-2026-83414. The available advisory characterizes the issue as an information disclosure flaw within the Coherence Core component, exposing a limited subset of data to attackers already authenticated on the host. Full technical detail is restricted to Oracle's customer advisory.
Attack Vector
Exploitation requires local access (AV:L) to the system hosting Coherence and a valid low-privilege account (PR:L). No user interaction is required. Attack complexity is high, indicating that specific conditions beyond attacker control must be met for the attack to succeed. The EPSS score is 0.118% at the 1.96 percentile, reflecting minimal predicted exploitation activity. No public proof-of-concept, exploit code, or CISA KEV listing exists for this CVE at the time of writing.
No verified proof-of-concept code has been published for this vulnerability. Refer to the Oracle advisory for details available to licensed customers.
Detection Methods for CVE-2026-83414
Indicators of Compromise
- No public indicators of compromise have been published for CVE-2026-83414.
- Unexpected local process access to Coherence data files or cache stores by low-privileged accounts should be treated as suspicious.
- Anomalous read operations against Coherence-managed data by accounts that do not routinely interact with the service.
Detection Strategies
- Audit local user activity on hosts running Oracle Coherence 15.1.1.0.0, focusing on accounts with logon rights but no operational role in Coherence.
- Correlate operating system authentication logs with Coherence process activity to identify unexpected local sessions.
- Enable detailed Coherence logging to capture data access patterns that deviate from application baselines.
Monitoring Recommendations
- Monitor filesystem access to Coherence configuration, cache, and persistence directories for reads by non-service accounts.
- Track privileged and semi-privileged local logons on Fusion Middleware hosts and alert on off-hours or unexpected sessions.
- Ingest host and application logs into a centralized analytics platform to support long-term retention and correlation.
How to Mitigate CVE-2026-83414
Immediate Actions Required
- Apply the patches referenced in the Oracle Security Alert CSPU Sep 2026 to affected Oracle Coherence 15.1.1.0.0 deployments.
- Restrict local logon rights on Coherence hosts to the minimum set of administrative and service accounts required to operate the platform.
- Review existing local accounts and remove or disable any that are unused or overly permissioned.
Patch Information
Oracle addressed CVE-2026-83414 in the Critical Security Patch Update for September 2026. Administrators should review the Oracle Security Alert CSPU Sep 2026 and apply the corresponding patch bundle for Oracle Fusion Middleware and Oracle Coherence. Verify patch application through Oracle's inventory tooling and validate Coherence functionality in a non-production environment before rolling out to production.
Workarounds
- Enforce strict access control on the operating system to prevent unauthorized local logons to Coherence hosts.
- Segment Coherence infrastructure onto dedicated hosts to reduce the number of users with local access.
- Apply host-level auditing and file integrity monitoring to detect unauthorized read attempts against Coherence data stores while patching is scheduled.
No vendor-published configuration workaround exists for CVE-2026-83414. Patching per Oracle's advisory is the recommended remediation path.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.