{"id":"CVE-2026-91391","kind":"vulnerability","aliases":["CVE-2026-91391"],"related":[],"title":"Oracle Siebel CRM End User: Open UI flaw leaks some stored data","description":"Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI).  Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User.  Successful attacks of this vulnerability can result in  unauthorized read access to a subset of Siebel CRM End User accessible data. CVSS 3.1 Base Score 3.7 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).","summary":"Oracle Siebel CRM End User, in the Open UI component, has a flaw that lets an unauthenticated attacker on the network send HTTP requests and read a subset of data the application can access. The attack is hard to carry out, and the CVSS 3.1 score is 3.7 with only confidentiality affected.","severity":"low","cvss":3.7,"epss":0.00258,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["oracle","self-hosted","siebel-crm","vendor"],"not_affected_if":["not-siebel-crm"],"how_to_check":"- Identify whether the environment runs Siebel CRM End User with supported versions `17.0` through `26.9`\n- unknown for further checks, the sources do not say","fix":"- Apply the Oracle Siebel CRM patch or update for the affected Open UI component; the sources do not name the fixed version\n- unknown for other actions, the sources do not say","status":"open","published_at":"2026-10-20T22:20:42+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T04:43:42+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T04:43:42Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Siebel CRM patch or update for the affected Open UI component; the sources do not name the fixed version\n- unknown for other actions, the sources do not say","reach":"network","title":"Oracle Siebel CRM End User: Open UI flaw leaks some stored data","impact":"low","summary":"Oracle Siebel CRM End User, in the Open UI component, has a flaw that lets an unauthenticated attacker on the network send HTTP requests and read a subset of data the application can access. The attack is hard to carry out, and the CVSS 3.1 score is 3.7 with only confidentiality affected.","category":"vendor","nicknames":[],"who_cares":["siebel-crm","oracle","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads a subset of Siebel CRM End User data","analyst_note":"Check Oracle's Siebel CPU advisory for the fixed release and whether Open UI is enabled by default.","how_to_check":"- Identify whether the environment runs Siebel CRM End User with supported versions `17.0` through `26.9`\n- unknown for further checks, the sources do not say","needs_analyst":true,"not_affected_if":["not-siebel-crm"],"who_is_affected":"Teams that run Oracle Siebel CRM End User on supported versions 17.0 through 26.9 with the Open UI component reachable over HTTP are affected. Sites that do not run Siebel CRM End User can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000622,"input_tokens":3449,"output_tokens":554,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-26.9':101C '-91391':15A,18A '/av':152C '17.0':100C '3.1':71B,142C,151C '3.7':74B,145C 'access':60B,111C,130C,139C 'affect':78B,98C 'allow':106C 'applic':58B 'attack':44B,62B,108C,121C 'base':143C 'carri':66B 'compon':36B,91C 'compromis':115C 'confidenti':77B,146C 'crm':3A,25B,29B,83C,90C,117C,136C 'cve':13A,16A 'cvss':70B,141C,148C,150C 'data':12A,56B,140C 'difficult':102C 'end':4A,30B,84C,118C,137C 'exploit':104C 'flaw':8A,39B 'h/pr':154C 'hard':64B 'host':22B 'http':49B,113C 'impact':147C 'l/i':158C 'leak':9A 'let':41B 'n':160C 'n/a':159C 'n/ac':153C 'n/s':156C 'n/ui':155C 'network':47B,110C 'open':6A,34B,92C 'oracl':1A,19B,27B,88C 'product':86C 'read':52B,129C 'request':50B 'result':126C 'score':72B,144C 'self':21B 'self-host':20B 'send':48B 'siebel':2A,24B,28B,82C,89C,116C,135C 'siebel-crm':23B 'store':11A 'subset':54B,133C 'success':120C 'support':94C 'u/c':157C 'ui':7A,35B,93C 'unauthent':43B,107C 'unauthor':128C 'user':5A,31B,85C,119C,138C 'vector':149C 'vendor':26B 'version':95C 'via':112C 'vulner':79C,105C,124C","nicknames":[],"mitigations":[],"who_affected":"Teams that run Oracle Siebel CRM End User on supported versions 17.0 through 26.9 with the Open UI component reachable over HTTP are affected. Sites that do not run Siebel CRM End User can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:42+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/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-2026-91391","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91391","severity":null,"published_at":"2026-10-20T22:20:42+00:00","modified_at":"2026-10-21T18:45:11+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","fetched_at":"2026-10-23T22:29:00+00:00","note":null},{"source":"epss","external_id":"CVE-2026-91391","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91391","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-25T12:38:52+00:00","fetched_at":"2026-10-25T12:38:52+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"}