EUVD-2026-62045
GHSA-7r9w-hxhm-rf6w
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Unauthenticated network HTTP access with low complexity gives AV:N/AC:L/PR:N/UI:N; impact is high integrity tampering and full DOS with no data disclosure, so C:N/I:H/A:H.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Portable Clusterware component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Portable Clusterware. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Portable Clusterware accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Portable Clusterware. CVSS 3.1 Base Score 9.1 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H).
AnalysisAI
Remote tampering and denial-of-service in Oracle Database Server's Portable Clusterware component lets an unauthenticated attacker reach the service over HTTP and manipulate or destroy critical cluster data, or force a complete, repeatable crash. Affected releases span 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3, carrying a CVSS 3.1 base score of 9.1 driven purely by high Integrity and Availability impact (confidentiality is untouched). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The prerequisite is network reachability of the Oracle Portable Clusterware component's HTTP interface on an affected Database Server (19.3-19.32, 21.3-21.23, or 23.4.0-23.26.3); the CVSS vector is AV:N/AC:L/PR:N/UI:N, so no authentication, no privileges, and no user interaction are needed against a reachable instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals align toward genuine high priority: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes trivial, unauthenticated, network-reachable exploitation, and the 9.1 score reflects both integrity and availability compromise. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the fixes in the Oracle August 2026 Critical Patch Update (https://www.oracle.com/security-alerts/cspuaug2026.html), which is the vendor advisory carrying the patch for the affected 19c, 21c, and 23ai release lines - patch available per vendor advisory, though a single exact fixed build number is not enumerated in the supplied data, so match the corrected release for your specific version from the CPU matrix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Oracle Database versions 19.3-19.32, 21.3-21.23, or 23.4.0-23.26.3 with Portable Clusterware enabled and restrict network access to Clusterware ports using firewall rules or network segmentation-allow connections only from trusted administrative networks. …
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External POC / Exploit Code
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