{"id":"CVE-2026-91568","title":"Vulnerability in the RDBMS component of Oracle Database Server","summary":"Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cvssSource":"cna","vendor":"Oracle Corporation","product":"Oracle Database Server","affected":["oracle_database_server >= 23.4.0 <= 23.26.3"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T21:26:33.039Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-91568","references":[{"url":"https://www.oracle.com/security-alerts/cpuoct2026.html","label":"Oracle Advisory"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T22:23:33.724Z","slug":"CVE-2026-91568","body":"## Overview\n\nVulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via Oracle Net to compromise RDBMS.  While the vulnerability is in RDBMS, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all RDBMS accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).\n\n## Affected\n\n- `oracle_database_server >= 23.4.0 <= 23.26.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}