CVE-2026-83411 in Coherence
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Coherence. Successful attacks of this vulnerability can result in takeover of Oracle Coherence. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Core component of Oracle Coherence, a high-performance distributed caching system that is part of the Oracle Fusion Middleware suite. This security flaw affects specific supported versions including 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. The nature of this vulnerability allows for remote exploitation by an attacker who possesses low-level privileges but has network access to the affected system via HTTP protocols. This classification indicates that while the attacker does not require administrative rights on the host machine initially, they must have some form of authenticated or accessible entry point within the network perimeter to initiate the attack vector against the Coherence service.
From a technical perspective, the flaw enables an easily exploitable compromise where the attacker can leverage specific interactions with the HTTP interface of Oracle Coherence to execute unauthorized actions. The severity is quantified by a CVSS 3.1 Base Score of 8.8, which falls into the Critical category. This high score reflects significant impacts across all three pillars of the security triad: confidentiality, integrity, and availability. Specifically, the vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) confirms that the attack requires no user interaction, has low complexity for exploitation, originates from a network location, and results in high impact on all security aspects when successful. The system boundary remains unchanged during the exploit, indicating a direct compromise of the application layer rather than a privilege escalation to the operating system level initially, though the consequences are severe.
The operational impact of this vulnerability is substantial due to its potential for complete takeover of Oracle Coherence instances. Since Coherence often serves as the backbone for data consistency and performance in enterprise applications, compromising it can lead to widespread disruption. An attacker gaining control over the cache layer can manipulate stored data, leading to integrity violations where critical business information is altered or corrupted. Furthermore, the confidentiality impact suggests that sensitive data cached within the system could be exfiltrated by unauthorized parties. The availability aspect implies that an attacker could potentially disrupt service for downstream applications relying on Coherence, causing denial of service conditions even if full persistence is not established immediately.
This vulnerability aligns with Common Weakness Enumeration categories such as CWE-20 Improper Input Validation or CWE-78 OS Command Injection depending on the specific mechanism exploited within the HTTP handler, though precise mapping requires deeper code analysis. In terms of MITRE ATT&CK framework classification, this activity likely corresponds to techniques involving Remote Services and potentially Execution if command injection is involved, falling under tactics like Initial Access and Impact. The low attack complexity and lack of user interaction make it particularly dangerous in automated scanning environments where attackers routinely probe for such weaknesses across the internet or internal networks.
Mitigation strategies must prioritize immediate patching by Oracle to apply the latest security updates that address this specific flaw within the Core component. Organizations running affected versions should verify their deployment status against the listed version numbers and schedule maintenance windows for upgrades as soon as possible. In scenarios where immediate patching is not feasible, network-level controls such as Web Application Firewalls can be configured to inspect HTTP traffic targeting Coherence endpoints for anomalous patterns indicative of exploitation attempts. Additionally, restricting access to these services through strict firewall rules or reverse proxy configurations that limit exposure only to trusted internal IP ranges can reduce the attack surface significantly until a permanent fix is deployed. Regular vulnerability assessments and penetration testing should also be conducted to ensure no other related weaknesses exist in the middleware configuration.