{"id":"CVE-2026-91632","kind":"vulnerability","aliases":["CVE-2026-91632"],"related":[],"title":"Oracle Essbase: low-privileged HTTP attacker can access critical data","description":"Vulnerability in Oracle Essbase (component: Security).   The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase.  While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Oracle Essbase accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).","summary":"Oracle Essbase version 21.8.3.0.0 has a Security component flaw that lets a low-privileged user reach it over HTTP. Successful exploitation exposes critical data and, due to scope change, can affect other products.","severity":"high","cvss":7.7,"epss":0.00282,"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":["no-http-exposure"],"how_to_check":"- Confirm the installed Oracle Essbase version and compare it with `21.8.3.0.0`\n- Check the Oracle Critical Patch Update advisory for the patched build (unknown from these sources)","fix":"- Apply the Oracle security patch for Essbase from the Oracle Critical Patch Update (exact fixed version unknown from these sources)\n- Restrict HTTP access to Essbase to trusted networks until patched","status":"open","published_at":"2026-10-20T22:21:03+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","triaged_at":"2026-10-25T03:10:36+00:00","updated_at":"2026-10-25T03:10:36+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T03:10:36Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle security patch for Essbase from the Oracle Critical Patch Update (exact fixed version unknown from these sources)\n- Restrict HTTP access to Essbase to trusted networks until patched","reach":"network","title":"Oracle Essbase: low-privileged HTTP attacker can access critical data","impact":"high","summary":"Oracle Essbase version 21.8.3.0.0 has a Security component flaw that lets a low-privileged user reach it over HTTP. Successful exploitation exposes critical data and, due to scope change, can affect other products.","category":"vendor","nicknames":[],"who_cares":["oracle-essbase","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker reads critical data and all Essbase-accessible data","analyst_note":"Confirm fixed version and patch location from the Oracle CPU advisory; the sources give no fixed version.","how_to_check":"- Confirm the installed Oracle Essbase version and compare it with `21.8.3.0.0`\n- Check the Oracle Critical Patch Update advisory for the patched build (unknown from these sources)","needs_analyst":true,"not_affected_if":["no-http-exposure"],"who_is_affected":"Teams running Oracle Essbase 21.8.3.0.0 with HTTP access reachable by low-privileged users. Deployments not exposing Essbase over HTTP to untrusted users are less exposed; the sources do not describe further conditions.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.00063,"input_tokens":3519,"output_tokens":556,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-91632':14A,17A '/av':139C '21.8.3.0.0':30B,74C '3.1':129C,138C '7.7':132C 'access':9A,84C,115C,121C,126C 'addit':102C 'affect':58B,72C 'allow':78C 'attack':7A,81C,98C,107C 'base':130C 'c/c':144C 'chang':56B,105C 'complet':120C 'compon':34B,65C 'compromis':88C 'confidenti':133C 'critic':10A,50B,117C 'cve':12A,15A 'cvss':128C,135C,137C 'data':11A,51B,118C,127C 'due':53B 'easili':75C 'essbas':2A,22B,28B,64C,90C,97C,125C 'essbase':19A 'exploit':48B,76C 'expos':49B 'flaw':35B 'h/i':145C 'host':25B 'http':6A,46B,86C 'impact':101C,134C 'l/pr':141C 'l/ui':142C 'let':37B 'low':4A,40B,79C 'low-privileg':3A,39B 'may':99C 'n':147C 'n/a':146C 'n/ac':140C 'n/s':143C 'network':83C 'oracl':1A,21B,27B,63C,89C,96C,124C 'oracle':18A 'oracle-essbas':20B 'privileg':5A,41B,80C 'product':60B,103C 'reach':43B 'result':112C 'scope':55B,104C 'score':131C 'secur':33B,66C 'self':24B 'self-host':23B 'signific':100C 'success':47B,106C 'support':68C 'unauthor':114C 'user':42B 'vector':136C 'vendor':26B 'version':29B,69C 'via':85C 'vulner':61C,77C,93C,110C","nicknames":[],"mitigations":[],"who_affected":"Teams running Oracle Essbase 21.8.3.0.0 with HTTP access reachable by low-privileged users. Deployments not exposing Essbase over HTTP to untrusted users are less exposed; the sources do not describe further conditions.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:21:03+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91632","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91632","severity":null,"published_at":"2026-10-20T22:21:03+00:00","modified_at":"2026-10-23T14:56:17+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-2026-91632","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91632","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"}