Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Oracle confirms unauthenticated (PR:N) low-complexity (AC:L) TCP network (AV:N) access yielding full takeover, so C:H/I:H/A:H with 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
Full compromise of Oracle Coherence (Oracle Fusion Middleware Core) is possible by unauthenticated attackers with TCP network access, per Oracle's July 2026 Critical Patch Update. The flaw is rated CVSS 9.8 and described by Oracle as 'easily exploitable,' allowing complete takeover of the in-memory data grid across supported versions 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 it is not listed in CISA KEV, but the unauthenticated network-takeover profile makes it a high-priority patch.
Technical ContextAI
Oracle Coherence is a distributed in-memory data grid used to cluster JVMs and share cached objects across nodes in Oracle Fusion Middleware and standalone Java deployments; nodes communicate over TCP (and historically the Coherence*Extend / TCMP cluster protocols). The affected component is 'Core.' Oracle did not assign a CWE (CWE: N/A), but 'takeover' via an unauthenticated network vector in a Java data-grid product is historically consistent with unsafe deserialization of untrusted objects received over the wire - a common root cause in Coherence and WebLogic advisories - though the specific weakness is not confirmed in the provided data. The CPE cpe:2.3:a:oracle_corporation:oracle_coherence:*:*:*:*:*:*:*:* is version-wildcarded and does not itself delimit the fixed builds.
RemediationAI
Apply the fixes from Oracle's July 2026 Critical Patch Update (https://www.oracle.com/security-alerts/cpujul2026.html) - Patch available per vendor advisory; the provided data does not include an exact fixed build number, so consult the CPU matrix for the precise patch for each of 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. Until patched, reduce exposure by restricting network access to Coherence cluster and Coherence*Extend proxy TCP ports so only trusted application hosts can reach them (firewall/segmentation), disabling any internet-facing Coherence*Extend proxy listeners not required, and enabling TLS and authentication on Coherence*Extend/cluster transport where supported - trade-offs are that tightening cluster membership and proxy ACLs can break legitimate client connectivity and requires validating your client/proxy topology before enforcement.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46665
GHSA-w848-r93p-w2vj