Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Adjacent-only cluster-network access (AV:A), no auth or interaction and low complexity per Oracle, with described full takeover mapping to C:H/I:H/A:H and unchanged scope.
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 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Oracle Coherence executes 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
AnalysisAI
Full takeover of Oracle Coherence (Core component) is possible by an unauthenticated attacker positioned on the same physical communication segment as the server, per Oracle's July 2026 Critical Patch Update. The flaw carries a CVSS 3.1 base score of 8.8 with high impact to confidentiality, integrity and availability, and affects Fusion Middleware deployments running Coherence 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. No public exploit identified at time of analysis, and the CVE is not listed in CISA KEV.
Technical ContextAI
Oracle Coherence is an in-memory data grid / distributed caching platform embedded in Oracle Fusion Middleware, used to cluster application-tier nodes that share state. Cluster members discover and communicate with each other over Coherence's own cluster protocol (TCMP, typically UDP/TCP on the cluster network), which is why the CVSS vector specifies AV:A (Adjacent) - an attacker must reach the layer-2/physical segment carrying inter-node cluster traffic. The advisory places the flaw in the 'Core' component and describes a full compromise, consistent with abuse of the trusted cluster-membership/communication channel rather than an authenticated management API. No CWE was assigned by the source, so the precise weakness class (e.g. deserialization, authentication bypass, or trust of unauthenticated cluster join) cannot be confirmed from the provided data; the vendor tag 'Information Disclosure' is present but understates the described total-takeover impact.
RemediationAI
Apply the fixes delivered in the Oracle July 2026 Critical Patch Update for the affected Coherence release train (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, or 15.1.1.0.0) as documented at https://www.oracle.com/security-alerts/cpujul2026.html; no exact patched build number is enumerated in the provided data, so treat this as 'patch available per vendor advisory' and pull the specific patch ID for your version from the CPU. Because the attack requires presence on the Coherence cluster communication segment, the highest-value compensating control until patching is network isolation: place Coherence cluster (TCMP) traffic on a dedicated, access-controlled VLAN or private interface, restrict cluster ports to known member IPs, and enable Coherence's built-in security features (authorized-hosts filtering and TLS/SSL for cluster and Extend traffic) - the trade-off is added configuration and potential latency/handshake overhead on inter-node communication. Avoid running Coherence cluster traffic on shared or user-accessible LAN segments.
More in Oracle Coherence
View allRemote takeover of Oracle Coherence (Fusion Middleware) via the Centralized Third Party Jars component allows an unauthe
Remote takeover of Oracle Coherence is possible via HTTP by an unauthenticated network attacker, affecting Oracle Fusion
Complete takeover of Oracle Coherence is achievable by an unauthenticated remote attacker over TCP, with the Core compon
Remote takeover of Oracle Coherence (Fusion Middleware component) is possible by unauthenticated network attackers reach
Remote takeover of Oracle Coherence is possible by unauthenticated attackers with HTTP network access to affected Fusion
Remote unauthenticated takeover of Oracle Coherence (Oracle Fusion Middleware) is possible over HTTPS, affecting support
Remote takeover of Oracle Coherence (Fusion Middleware Core component) lets an unauthenticated attacker with TCP network
Remote takeover of Oracle Coherence (the Core component of Oracle Fusion Middleware) allows an unauthenticated attacker
Full takeover of Oracle Coherence (Core component) in Oracle Fusion Middleware versions 14.1.1.0.0, 14.1.2.0.0, and 15.1
Complete takeover of Oracle Coherence (Oracle Fusion Middleware Core component) is achievable by an unauthenticated remo
Full compromise of Oracle Coherence, the in-memory data grid within Oracle Fusion Middleware, is possible over the netwo
Complete takeover of Oracle Coherence is possible when an unauthenticated attacker with TCP network access exploits a Co
Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46617
GHSA-4g25-xq6q-97c2