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    CVE-2026-91499

    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 DBMS_VECTOR privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

    Published:Oct 20, 2026
    Last Modified:Oct 24, 2026
    EPS:Oct 20, 2026
    EPSS Score:0.00447
    CVSS Score:8.8

    Affected Products

    Vendor
    Oracle
    Product
    Database - Rdbms
    Vendor
    Oracle
    Product
    Database Server
    Vendor
    Oracle Corporation
    Product
    Oracle Database Server

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-269 Improper Privilege Management

    Related CVEs

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    CVE-2026-101512 (CVSS 6.5) — Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4…
    CVE-2026-83351 (CVSS 8.1) — Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4…
    CVE-2026-83348 (CVSS 8.8) — Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 19.3…
    CVE-2026-83271 (CVSS 8.8) — Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 19.3…
    CVE-2026-83160 (CVSS 8.8) — Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High