Severity by source
AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Network-reachable but Oracle rates it difficult (AC:H) and requiring low privilege (PR:L); scope change (S:C) and full takeover justify C:H/I:H/A:H.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
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. Difficult to exploit vulnerability allows low privileged attacker with network access via TCP to compromise Oracle Coherence. While the vulnerability is in Oracle Coherence, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Coherence. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).
AnalysisAI
Full takeover of Oracle Coherence (Fusion Middleware Core) is possible by a low-privileged network attacker over TCP in supported versions 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0, with a scope change that can significantly impact additional co-located products beyond Coherence itself. Rated CVSS 3.1 8.5 with high confidentiality, integrity and availability impact, though the high attack complexity means exploitation is not trivial. No public exploit identified at time of analysis and it is not listed in CISA KEV.
Technical ContextAI
Oracle Coherence is an in-memory data grid and distributed caching platform bundled with Oracle Fusion Middleware, used to cluster application state and share data across nodes over TCP-based cluster protocols (TCMP and Coherence*Extend). The flaw is in the Core component and produces a scope change (S:C), which for a data grid typically means abuse of the clustering/serialization layer lets an attacker escape the trust boundary of the Coherence process and reach other co-located Fusion Middleware components. Oracle assigned no CWE, but a network-reachable, scope-changing takeover of a Java data grid is consistent with unsafe deserialization or over-trust of clustered peer input, a recurring root-cause class for this software category.
RemediationAI
Apply the fixes from the Oracle July 2026 Critical Patch Update (https://www.oracle.com/security-alerts/cpujul2026.html) - patch available per vendor advisory for Coherence 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0; Oracle lists the exact patch and bundle numbers per version in the CPU matrix, so apply the entry matching your deployed release. Until patched, restrict network access to Coherence cluster and Coherence*Extend proxy ports (TCMP and Extend listeners) to trusted management segments via firewall or security groups, which limits the AV:N reach but will break legitimate remote grid clients and cross-datacenter clustering. Enforce authentication and TLS on Coherence*Extend and TCMP using the Coherence security framework and identity tokens so the required low-level privilege cannot be trivially obtained, at the cost of certificate and identity-management overhead. Where feasible, isolate the Coherence tier from other Fusion Middleware components to contain the scope-change pivot.
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46710
GHSA-hrhq-5gqf-mrh6