Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Oracle describes unauthenticated TCP-based, easily-exploitable takeover with full CIA loss, so AV:N/AC:L/PR:N/UI:N and C:H/I:H/A:H; scope unchanged as compromise is of Coherence itself.
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 (Oracle Fusion Middleware, Core component) allows an unauthenticated attacker with TCP network access to fully compromise the product across supported versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Oracle rates this 'easily exploitable' with complete confidentiality, integrity and availability loss (CVSS 9.8), disclosed in the July 2026 Critical Patch Update. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the unauthenticated network-facing nature makes it a high-priority patch.
Technical ContextAI
Oracle Coherence is a distributed in-memory data grid used to cache and manage application state at scale, commonly embedded within Oracle Fusion Middleware and WebLogic Server deployments for clustered Java (JEE) applications. Cluster members communicate over TCP/TCMP and expose management/extend proxy endpoints, which are the typical exposure surface for the affected 'Core' component. Oracle did not assign a CWE (CWE: N/A) and does not publish root-cause detail, but 'takeover' of a Java data-grid node via an unauthenticated network request is historically consistent with unsafe deserialization or protocol-handling flaws in the cluster/proxy layer; this specific mechanism is not confirmed in the available data. The single CPE provided (cpe:2.3:a:oracle_corporation:oracle_coherence:*:*:*:*:*:*:*:*) is a wildcard version match and does not itself delimit the affected versions - those come from the description.
RemediationAI
Apply the fixes delivered in the Oracle Critical Patch Update (CPU) of July 2026 - see https://www.oracle.com/security-alerts/cpujul2026.html - which is the primary remediation; consult that advisory for the exact patched build for each affected version (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0), as no single exact fix version is stated in the available data (patch available per vendor advisory). Until patched, reduce exposure with concrete compensating controls: restrict network access to Coherence cluster (TCMP) and Extend/proxy TCP ports so they are reachable only from trusted application-tier hosts via firewall/security-group allow-lists (side effect: cluster members and Extend clients outside the allow-list will lose connectivity, so scope carefully); ensure no Coherence port is exposed to the internet or untrusted VLANs; and where supported, enable TLS/authentication on Coherence Extend and cluster communication to raise the bar for anonymous access. Do not rely on the 'Information Disclosure' tag to downscope patching - the CVSS vector indicates full integrity and availability impact as well.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46655
GHSA-v3jg-jwwj-vvx4