{"id":"CVE-2026-91645","kind":"vulnerability","aliases":["CVE-2026-91645"],"related":[],"title":"Oracle Essbase: unauthenticated HTTP request reads a subset of data","description":"Vulnerability in Oracle Essbase (component: Security).   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 21.8.3.0.0 has a Security component flaw that an unauthenticated attacker can reach over the network via HTTP. 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":["oracle-essbase","self-hosted","vendor"],"not_affected_if":["not-essbase-21.8.3.0.0"],"how_to_check":"- Check the installed Essbase version against `21.8.3.0.0`\n- unknown","fix":"- Move Essbase to the fixed release named in Oracle's Critical Patch Update advisory (version unknown from the sources)","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":"- Move Essbase to the fixed release named in Oracle's Critical Patch Update advisory (version unknown from the sources)","reach":"network","title":"Oracle Essbase: unauthenticated HTTP request reads a subset of data","impact":"low","summary":"Oracle Essbase 21.8.3.0.0 has a Security component flaw that an unauthenticated attacker can reach over the network via HTTP. A successful attack gives read access to a subset of data Essbase can reach.","category":"vendor","nicknames":[],"who_cares":["oracle-essbase","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"unauthenticated read of a subset of Essbase data","analyst_note":"Confirm the fixed version and the exact affected component from Oracle's CPU advisory; the NVD entry does not name the fix.","how_to_check":"- Check the installed Essbase version against `21.8.3.0.0`\n- unknown","needs_analyst":true,"not_affected_if":["not-essbase-21.8.3.0.0"],"who_is_affected":"Teams running Oracle Essbase 21.8.3.0.0 with the HTTP interface reachable from the network. The sources do not describe a non-default configuration; a deployment that is not exposed on the network is less at risk.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000593,"input_tokens":3482,"output_tokens":489,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-91645':13A,16A '/av':118C '21.8.3.0.0':28B,72C '3.1':108C,117C '5.3':111C 'access':50B,81C,98C,105C 'affect':70C 'allow':76C 'attack':37B,47B,78C,89C 'base':109C 'compon':32B,63C 'compromis':85C 'confidenti':112C 'cve':11A,14A 'cvss':107C,114C,116C 'data':10A,55B,106C 'easili':73C 'essbas':2A,21B,27B,56B,62C,87C,104C 'essbase':18A 'exploit':74C 'flaw':33B 'give':48B 'host':24B 'http':4A,44B,83C 'impact':113C 'l/i':124C 'l/pr':120C 'n':126C 'n/a':125C 'n/ac':119C 'n/s':122C 'n/ui':121C 'network':42B,80C 'oracl':1A,20B,26B,61C,86C,103C 'oracle':17A 'oracle-essbas':19B 'reach':39B,58B 'read':6A,49B,97C 'request':5A 'result':94C 'score':110C 'secur':31B,64C 'self':23B 'self-host':22B 'subset':8A,53B,101C 'success':46B,88C 'support':66C 'u/c':123C 'unauthent':3A,36B,77C 'unauthor':96C 'vector':115C 'vendor':25B 'version':67C 'via':43B,82C 'vulner':59C,75C,92C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Essbase 21.8.3.0.0 with the HTTP interface reachable from the network. The sources do not describe a non-default configuration; a deployment that is not exposed on the network is less at risk.","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-2026-91645","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91645","severity":null,"published_at":"2026-10-20T22:21:04+00:00","modified_at":"2026-10-23T14:58:22+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-2026-91645","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91645","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"}