Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network reach over HTTP/2 with no user interaction gives AV:N/AC:L/PR:N/UI:N, and vendor-stated full takeover justifies 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 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 HTTP/2 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 network access via HTTP/2 to fully compromise affected versions 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. The flaw yields complete confidentiality, integrity, and availability loss (CVSS 3.1 base 9.8) and was disclosed by Oracle in the July 2026 Critical Patch Update. No public exploit identified at time of analysis, but the network-reachable, no-privilege, no-interaction profile makes it a top-priority patching target.
Technical ContextAI
Oracle Coherence is an in-memory distributed data grid used to cache and manage application state at scale, commonly deployed alongside Oracle WebLogic Server and other Fusion Middleware stacks in enterprise Java environments. The Core component is the foundational clustering and data-management layer, and the vulnerability is reachable over HTTP/2, indicating the exposure is in a network-facing listener/protocol handler rather than an internal cluster-only channel. Oracle assigned no CWE (CWE: N/A) and published no class-level root-cause detail; the combination of full C/I/A impact with unauthenticated network reach is consistent with a deserialization or request-parsing flaw of the type historically seen in Coherence/WebLogic, but the exact weakness class is not confirmed in the available data.
RemediationAI
Apply the Oracle July 2026 Critical Patch Update fixes for Oracle Coherence per https://www.oracle.com/security-alerts/cpujul2026.html; Oracle delivers these as CPU patch bundles rather than a single upstream version tag, so identify and apply the correct patch for your installed 14.1.1.0.0, 14.1.2.0.0, or 15.1.1.0.0 release (patch available per vendor advisory; no standalone fixed version string is provided in the input). Until patched, restrict network reachability of the Coherence HTTP/2 listener: block or firewall the affected port from untrusted networks, place the service behind an authenticated reverse proxy or VPN, and limit access to known application-tier hosts only - the trade-off is that legitimate clients or clustered peers relying on that endpoint must be explicitly allow-listed or they will lose connectivity. Because the vector is HTTP/2, disabling or fronting the HTTP/2 endpoint where it is not required also reduces exposure, at the cost of any functionality that depends on it. Do not rely on authentication controls as a mitigation since exploitation requires no privileges.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46695
GHSA-r692-h44v-fqj7