Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor states easily exploitable, unauthenticated network (TCP) access yielding full product takeover, so AV:N/AC:L/PR:N/UI:N with complete C/I/A impact 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 network access via TCP to compromise Oracle Coherence. Successful attacks of this vulnerability can result in takeover of Oracle Coherence. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
AnalysisAI
Remote takeover of Oracle Coherence (Fusion Middleware Core component) allows an unauthenticated network attacker to fully compromise the affected instance over TCP, per Oracle's July 2026 Critical Patch Update. Affected supported versions are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0, all carrying a CVSS 3.1 base score of 9.8 with full confidentiality, integrity and availability impact. No public exploit identified at time of analysis and the issue is not listed in CISA KEV, but the 'easily exploitable / unauthenticated / network' profile makes it a high-priority patch item.
Technical ContextAI
Oracle Coherence is an in-memory data grid and distributed caching platform bundled with Oracle Fusion Middleware, used to scale stateful Java applications through clustered caching, event processing and data partitioning across nodes. The flaw resides in the 'Core' component and is reachable over TCP, consistent with Coherence's cluster and proxy/extend communication services which listen on the network for member and client traffic. Oracle assigns no CWE (CWE: N/A) and does not publish root-cause detail; given a full-takeover impact in a Java middleware data grid reachable pre-authentication, the class most plausibly involves unsafe deserialization or protocol-level handling of untrusted network input, but this is inferred, not confirmed by the vendor.
RemediationAI
Apply the fixes delivered in the Oracle July 2026 Critical Patch Update (https://www.oracle.com/security-alerts/cpujul2026.html) - Patch available per vendor advisory; Oracle publishes patched builds per affected version (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0) through the CPU rather than a single tagged release, so consult the CPU patch matrix for the exact bundle for your version and prioritize this as a critical, unauthenticated-takeover fix. Until patched, reduce exposure by restricting network access to Coherence cluster and Coherence*Extend/proxy listener ports so they are reachable only from trusted application-tier hosts (firewall/segmentation), which prevents untrusted TCP clients from reaching the vulnerable service but can break legitimate remote Extend clients that are not whitelisted. Where Coherence security is supported, enable cluster member authentication/TLS and disable unauthenticated Extend proxy endpoints; note these controls may require configuration changes and client-side updates and are compensating measures only - not a substitute for the CPU patch.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46677
GHSA-jqpm-rccg-j7vp