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CVE-2026-91644 is a vulnerability in the Security component of Oracle Essbase affecting supported version 21.8.3.0.0. An unauthenticated attacker with network access over HTTP can exploit it with low attack complexity and no user interaction. Successful exploitation permits unauthorized access to critical data or all data accessible through Oracle Essbase, along with unauthorized modification of some accessible data. Impacts can extend to additional products beyond Oracle Essbase. The vulnerability has a CVSS v3.1 base score of 9.3 with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N. The underlying weakness and vulnerable function are not specified.
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No public exploit code observed for this vulnerability.
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A critical vulnerability in the Security component of Oracle Essbase 21.8.3.0.0 allows unauthenticated attackers with HTTP network access to read critical data or all Essbase-accessible data and modify, insert, or delete some accessible data. Exploitation requires no user interaction and may significantly affect additional products through a scope change. The CVSS 3.1 score is 9.3, with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N.
A critical vulnerability in the Security component of Oracle Essbase 21.8.3.0.0 allows unauthenticated attackers to compromise the product over HTTP without user interaction. Successful exploitation can expose critical data or all Essbase-accessible data and permit unauthorized updates, insertions, or deletions of some accessible data. Attacks may significantly affect additional, unspecified products. The CVSS 3.1 score is 9.3, with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N. The record was received on October 20, 2026.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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