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CVE-2026-91647 affects the Security component of Oracle Essbase 21.8.3.0.0. An unauthenticated attacker with TCP network access can exploit the vulnerability to take over Oracle Essbase without user interaction. Exploitation has high attack complexity; the underlying flaw and vulnerable function are not specified. The CVSS 3.1 base score is 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
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No public exploit code observed for this vulnerability.
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A vulnerability in the Security component of Oracle Essbase 21.8.3.0.0 allows an unauthenticated attacker with TCP network access to take over Oracle Essbase. Exploitation has high complexity but requires no user interaction. The CVSS 3.1 base score is 8.1, with high confidentiality, integrity, and availability impacts.
A vulnerability in the Security component of Oracle Essbase 21.8.3.0.0 allows an unauthenticated attacker with TCP network access to take over Oracle Essbase. Exploitation has high complexity but requires no user interaction. The CVSS 3.1 score is 8.1, with high confidentiality, integrity, and availability impacts; vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.