Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Network-reachable SAML flow with low complexity and only low privileges required (PR:L), full server takeover gives C/I/A High, and impact beyond the component's authority justifies S:C.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Oracle WebLogic Server 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 low privileged attacker with network access via SAML to compromise Oracle WebLogic Server. While the vulnerability is in Oracle WebLogic Server, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
AnalysisAI
Full server takeover in Oracle WebLogic Server (Fusion Middleware Core component) is achievable by a low-privileged, network-adjacent attacker abusing the SAML authentication path, with a scope change that can propagate impact into additional connected products. 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; the CVSS 9.9 rating reflects complete loss of confidentiality, integrity and availability. No public exploit identified at time of analysis, and the flaw is not listed in CISA KEV, but the low complexity and low privilege requirement make it a top-priority patching item.
Technical ContextAI
Oracle WebLogic Server is a widely deployed Java EE application server that sits at the core of many Oracle Fusion Middleware stacks. The flaw resides in the 'Core' component and is reached via SAML - the Security Assertion Markup Language single sign-on / federation flow - implying a weakness in how the server validates or processes SAML assertions or trust relationships. Oracle assigned no CWE, but the class is consistent with improper authentication/authorization handling in SAML processing (e.g., assertion validation or signature-trust weaknesses) that lets an authenticated-but-low-privileged principal escalate to full control. The CVSS scope change (S:C) indicates the vulnerable WebLogic component can affect resources beyond its own security authority, such as downstream integrated Fusion Middleware or backend systems that trust WebLogic.
RemediationAI
Apply the fixes from Oracle's July 2026 Critical Patch Update (https://www.oracle.com/security-alerts/cpujul2026.html) to every affected release (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0); Patch available per vendor advisory, though Oracle CPUs distribute patch bundles rather than a single named fix version, so consult the CPU matrix for the exact patch ID matching your installation. Until patched, reduce exposure by restricting network reachability of WebLogic administrative and SAML/SSO endpoints to trusted networks only (e.g., front them behind a VPN or reverse proxy with strict allow-lists), and if SAML single sign-on is not required, disabling or removing the SAML identity-asserter/service-provider configuration removes the attack surface at the cost of breaking federated login. Tighten and monitor low-privilege account provisioning since PR:L exploitation requires a minimal foothold. Note the trade-off: network restrictions may disrupt legitimate remote administration and federated partners, so stage changes carefully.
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Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46612
GHSA-crc2-q53j-p7j9