{"id":"CVE-2026-91643","kind":"vulnerability","aliases":["CVE-2026-91643"],"related":[],"title":"Oracle Essbase: Java Based Agent flaw leaks a subset of data","description":"Vulnerability in Oracle Essbase (component: Java Based Agent).   The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows unauthenticated 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 5.3 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).","summary":"Oracle Essbase's Java Based Agent has a flaw that an unauthenticated attacker can reach over HTTP from the network. A successful attack gives read access to a subset of data Essbase can reach.","severity":"medium","cvss":5.3,"epss":0.00251,"exploited":false,"exploited_at":null,"products":[{"name":"oracle essbase","fixed":[],"affected":"= 21.8.3.0.0","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["java","on-prem","oracle-essbase","vendor"],"not_affected_if":["agent-not-reachable","other-essbase-versions"],"how_to_check":"- Check the installed Essbase version against `21.8.3.0.0`, the affected version named in the sources\n- Confirm whether the Java Based Agent component is running and reachable over HTTP from the network","fix":"- Apply the Oracle Critical Patch Update that addresses this CVE (the fixed version is unknown from the sources)\n- Restrict network access to the Java Based Agent endpoint until patched","status":"open","published_at":"2026-10-20T22:21:04+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","triaged_at":"2026-10-25T04:22:27+00:00","updated_at":"2026-10-25T04:22:27+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T04:22:27Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Critical Patch Update that addresses this CVE (the fixed version is unknown from the sources)\n- Restrict network access to the Java Based Agent endpoint until patched","reach":"network","title":"Oracle Essbase: Java Based Agent flaw leaks a subset of data","impact":"low","summary":"Oracle Essbase's Java Based Agent has a flaw that an unauthenticated attacker can reach over HTTP from the network. A successful attack gives read access to a subset of data Essbase can reach.","category":"vendor","nicknames":[],"who_cares":["oracle-essbase","java","on-prem"],"confidence":0.6,"needs_auth":"no","worst_case":"unauthenticated remote read of a subset of Essbase data","analyst_note":"Confirm the fixed version and default exposure of the Java Based Agent from the Oracle Critical Patch Update advisory linked by NVD.","how_to_check":"- Check the installed Essbase version against `21.8.3.0.0`, the affected version named in the sources\n- Confirm whether the Java Based Agent component is running and reachable over HTTP from the network","needs_analyst":true,"not_affected_if":["other-essbase-versions","agent-not-reachable"],"who_is_affected":"Teams running Oracle Essbase version 21.8.3.0.0 with the Java Based Agent reachable over HTTP. The sources do not say whether the agent is enabled by default, so check whether it is exposed on your network.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000626,"input_tokens":3492,"output_tokens":554,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-91643':14A,17A '/av':123C '21.8.3.0.0':77C '3.1':113C,122C '5.3':116C 'access':53B,86C,103C,110C 'affect':75C 'agent':5A,33B,69C 'allow':81C 'attack':40B,50B,83C,94C 'base':4A,32B,68C,114C 'compon':66C 'compromis':90C 'confidenti':117C 'cve':12A,15A 'cvss':112C,119C,121C 'data':11A,58B,111C 'easili':78C 'essbas':2A,26B,29B,59B,65C,92C,109C 'essbase':19A 'exploit':79C 'flaw':6A,36B 'give':51B 'http':44B,88C 'impact':118C 'java':3A,20B,31B,67C 'l/i':129C 'l/pr':125C 'leak':7A 'n':131C 'n/a':130C 'n/ac':124C 'n/s':127C 'n/ui':126C 'network':47B,85C 'on-prem':21B 'oracl':1A,25B,28B,64C,91C,108C 'oracle':18A 'oracle-essbas':24B 'prem':23B 'reach':42B,61B 'read':52B,102C 'result':99C 'score':115C 'subset':9A,56B,106C 'success':49B,93C 'support':71C 'u/c':128C 'unauthent':39B,82C 'unauthor':101C 'vector':120C 'vendor':27B 'version':72C 'via':87C 'vulner':62C,80C,97C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Essbase version 21.8.3.0.0 with the Java Based Agent reachable over HTTP. The sources do not say whether the agent is enabled by default, so check whether it is exposed on your network.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:21:04+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91643","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91643","severity":null,"published_at":"2026-10-20T22:21:04+00:00","modified_at":"2026-10-23T14:57:58+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-91643","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91643","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:55+00:00","fetched_at":"2026-10-24T13:15:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}