CVE-2026-83414 in Coherence
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). The supported version that is affected is 15.1.1.0.0. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Coherence executes to compromise Oracle Coherence. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Coherence accessible data. CVSS 3.1 Base Score 2.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Core component of Oracle Coherence, a key part of the Oracle Fusion Middleware suite, specifically affecting version 15.1.1.0. This security flaw is characterized by its difficulty to exploit and requires specific preconditions for successful attack execution. The primary requirement for an attacker to leverage this issue is having low-privileged access with valid logon credentials on the infrastructure where the vulnerable Oracle Coherence instance executes. This constraint significantly limits the potential threat landscape, as it excludes remote unauthenticated attackers or those requiring high-level administrative privileges. Consequently, the risk profile is primarily relevant to insider threats or compromised accounts within a trusted network segment rather than external adversaries seeking widespread exploitation from the internet.
From a technical perspective, the vulnerability allows for unauthorized read access to a subset of data accessible by Oracle Coherence. This indicates that while the attacker cannot modify or delete information, nor can they disrupt service availability through this specific vector, they are able to extract sensitive information stored within the cache clusters managed by Coherence. The impact is strictly confined to confidentiality, as evidenced by the CVSS 3.1 base score of 2.5 and the specific vector components showing no impact on integrity or availability. This type of flaw often stems from insufficient access control checks during data retrieval operations, allowing a user with limited privileges to bypass intended restrictions and view cached entries that should remain restricted to higher-privileged users or internal system processes only.
In terms of industry standard classifications, this vulnerability aligns closely with CWE-269, which describes Improper Privilege Management, specifically where an actor obtains elevated access without proper authorization relative to the data being accessed. Furthermore, from a tactical standpoint within the MITRE ATT&CK framework, this behavior corresponds to techniques under Data Staged or potentially Credential Access if the retrieved data includes sensitive credentials, though it most directly maps to unauthorized data exfiltration via application layer vulnerabilities. The low attack complexity and requirement for local logon suggest that traditional perimeter defenses may not detect such an intrusion, making internal monitoring and strict identity governance critical components of a defense-in-depth strategy against this specific threat vector.
The operational impact of this vulnerability is primarily related to the potential exposure of confidential business data cached within Oracle Coherence clusters. Since Coherence is often used for high-performance caching in enterprise applications, the exposed subset of data could include user profiles, session tokens, or transactional details depending on how the application utilizes the cache. Although the CVSS score indicates a low severity due to the limited scope and difficulty of exploitation, any unauthorized disclosure of cached data can lead to compliance violations under regulations such as GDPR or HIPAA if personal health information or personally identifiable information is involved. Organizations must assess whether their specific deployment patterns expose sensitive data through this vector before determining the urgency of remediation efforts relative to other security priorities.
To mitigate this risk, organizations should ensure that Oracle Coherence instances are deployed with strict least-privilege principles applied to all service accounts and user identities interacting with the middleware. This includes auditing existing access controls to verify that low-privileged users do not have unnecessary read permissions on sensitive cache regions. Additionally, implementing network segmentation can limit lateral movement, ensuring that even if an attacker gains logon access to a host running Coherence, they cannot easily reach other critical systems or exfiltrate data without detection. Regularly applying the latest security patches provided by Oracle is essential, as vendor updates typically address such privilege escalation and access control flaws in subsequent releases of Fusion Middleware components.