{"id":"CVE-2026-91648","kind":"vulnerability","aliases":["CVE-2026-91648"],"related":[],"title":"Oracle Essbase: unauthenticated network attacker can read 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 TCP 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":"A flaw in the Java Based Agent component of Oracle Essbase lets an unauthenticated attacker reach the product over TCP. A successful attack gives read access to a subset of data Essbase can reach.","severity":"medium","cvss":5.3,"epss":0.0033,"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":["unknown"],"how_to_check":"- Confirm whether Oracle Essbase `21.8.3.0.0` is deployed and whether the Java Based Agent is running.\n- unknown for other checks; the sources do not list configuration paths or commands.","fix":"- Move Oracle Essbase off `21.8.3.0.0` to the fixed release named in Oracle's Critical Patch Update advisory; the fixed version is unknown in these sources.","status":"open","published_at":"2026-10-20T22:21:05+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":"- Move Oracle Essbase off `21.8.3.0.0` to the fixed release named in Oracle's Critical Patch Update advisory; the fixed version is unknown in these sources.","reach":"network","title":"Oracle Essbase: unauthenticated network attacker can read a subset of data","impact":"low","summary":"A flaw in the Java Based Agent component of Oracle Essbase lets an unauthenticated attacker reach the product over TCP. 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":"Attacker reads a subset of Essbase-accessible data over the network","analyst_note":"Check Oracle's CPU advisory for the fixed Essbase version and whether the Java Based Agent is on by default (nvd.nist.gov/vuln/detail/CVE-2026-91648).","how_to_check":"- Confirm whether Oracle Essbase `21.8.3.0.0` is deployed and whether the Java Based Agent is running.\n- unknown for other checks; the sources do not list configuration paths or commands.","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Teams running Oracle Essbase at version `21.8.3.0.0` with the Java Based Agent reachable over the network. The sources do not say which deployment settings expose the agent, so unknown whether a default install is affected.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000631,"input_tokens":3491,"output_tokens":563,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-91648':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':34B,69C 'allow':81C 'attack':5A,42B,50B,83C,94C 'base':33B,68C,114C 'compon':35B,66C 'compromis':90C 'confidenti':117C 'cve':12A,15A 'cvss':112C,119C,121C 'data':11A,58B,111C 'easili':78C 'essbas':2A,26B,38B,59B,65C,92C,109C 'essbase':19A 'exploit':79C 'flaw':29B 'give':51B 'impact':118C 'java':20B,32B,67C 'l/i':129C 'l/pr':125C 'let':39B 'n':131C 'n/a':130C 'n/ac':124C 'n/s':127C 'n/ui':126C 'network':4A,85C 'on-prem':21B 'oracl':1A,25B,37B,64C,91C,108C 'oracle':18A 'oracle-essbas':24B 'prem':23B 'product':45B 'reach':43B,61B 'read':7A,52B,102C 'result':99C 'score':115C 'subset':9A,56B,106C 'success':49B,93C 'support':71C 'tcp':47B,88C 'u/c':128C 'unauthent':3A,41B,82C 'unauthor':101C 'vector':120C 'vendor':27B 'version':72C 'via':87C 'vulner':62C,80C,97C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Essbase at version `21.8.3.0.0` with the Java Based Agent reachable over the network. The sources do not say which deployment settings expose the agent, so unknown whether a default install is affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:21:05+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-2026-91648","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91648","severity":null,"published_at":"2026-10-20T22:21:05+00:00","modified_at":"2026-10-23T14:59:09+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-2026-91648","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91648","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"}