Is CVE-2026-91657 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-91657?

CVE-2026-91657 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-91657

Description

Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Essbase accessible data. CVSS 3.1 Base Score 4.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).