{"id":"CVE-2026-91428","kind":"vulnerability","aliases":["CVE-2026-91428"],"related":[],"title":"Oracle Siebel CRM End User: Open UI flaw allows limited unauthorized data changes","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. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Siebel CRM End User accessible data. CVSS 3.1 Base Score 4.3 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N).","summary":"Oracle Siebel CRM End User Open UI has a flaw that lets an unauthenticated network attacker alter some accessible data, but only when a logged-in user is tricked into a request. The sources rate it CVSS 4.3 with integrity impact only, and say supported versions 17.0 through 26.9 are affected.","severity":"medium","cvss":4.3,"epss":0.00201,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["crm","oracle-siebel","vendor","web-ui"],"not_affected_if":[],"how_to_check":"- Check the Siebel CRM version in use against 17.0 through 26.9 (unknown how the sources expect this to be read in your deployment)\n- Review the Oracle Critical Patch Update advisory for the Siebel CRM End User patch level in use (unknown from the sources)","fix":"- Apply the Oracle Siebel CRM patch referenced in the Oracle Critical Patch Update advisory for this CVE (unknown from the sources)","status":"open","published_at":"2026-10-20T22:20:46+00:00","first_seen_at":"2026-10-23T21:57:26+00:00","triaged_at":"2026-10-25T04:37:52+00:00","updated_at":"2026-10-25T12:38:52+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T04:37:52Z","model":"claude-haiku-5-5","output":{"fix":"- Apply the Oracle Siebel CRM patch referenced in the Oracle Critical Patch Update advisory for this CVE (unknown from the sources)","reach":"internet","title":"Oracle Siebel CRM End User: Open UI flaw allows limited unauthorized data changes","impact":"medium","summary":"Oracle Siebel CRM End User Open UI has a flaw that lets an unauthenticated network attacker alter some accessible data, but only when a logged-in user is tricked into a request. The sources rate it CVSS 4.3 with integrity impact only, and say supported versions 17.0 through 26.9 are affected.","category":"vendor","nicknames":[],"who_cares":["oracle-siebel","crm","web-ui"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker makes limited unauthorized data changes in Siebel CRM End User","analyst_note":"Confirm the patched Siebel CRM End User versions and the Oracle CPU advisory link for CVE-2026-91428; sources give no fix or check details.","how_to_check":"- Check the Siebel CRM version in use against 17.0 through 26.9 (unknown how the sources expect this to be read in your deployment)\n- Review the Oracle Critical Patch Update advisory for the Siebel CRM End User patch level in use (unknown from the sources)","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Organizations running Oracle Siebel CRM End User with the Open UI component in the affected version range. The sources do not say which configurations or deployment modes are exposed, so the exact population is unknown.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000647,"input_tokens":3472,"output_tokens":600,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-26.9':102C '-91428':16A,19A '/av':166C '17.0':75B,101C '26.9':77B '3.1':156C,165C '4.3':66B,159C 'access':46B,111C,145C,153C 'affect':79B,99C 'allow':9A,106C 'alter':44B 'attack':43B,108C,121C,131C,133C 'base':157C 'chang':13A 'compon':92C 'compromis':115C 'crm':3A,20B,30B,84C,91C,117C,150C 'cve':14A,17A 'cvss':65B,155C,162C,164C 'data':12A,47B,154C 'delet':144C 'easili':103C 'end':4A,31B,85C,118C,151C 'exploit':104C 'flaw':8A,37B 'http':113C 'human':123C 'impact':69B,161C 'insert':142C 'integr':68B,160C 'interact':124C 'l/a':173C 'l/pr':168C 'let':39B 'limit':10A 'log':53B 'logged-in':52B 'n':174C 'n/ac':167C 'n/i':172C 'n/ui':169C 'network':42B,110C 'open':6A,33B,93C 'oracl':1A,22B,28B,89C 'oracle-siebel':21B 'person':127C 'product':87C 'r/s':170C 'rate':63B 'request':60B 'requir':122C 'result':138C 'say':72B 'score':158C 'siebel':2A,23B,29B,83C,90C,116C,149C 'sourc':62B 'success':120C,132C 'support':73B,95C 'trick':57B 'u/c':171C 'ui':7A,27B,34B,94C 'unauthent':41B,107C 'unauthor':11A,140C 'updat':141C 'user':5A,32B,55B,86C,119C,152C 'vector':163C 'vendor':24B 'version':74B,96C 'via':112C 'vulner':80C,105C,136C 'web':26B 'web-ui':25B","nicknames":[],"mitigations":[],"who_affected":"Organizations running Oracle Siebel CRM End User with the Open UI component in the affected version range. The sources do not say which configurations or deployment modes are exposed, so the exact population is unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:46+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-91428","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91428","severity":null,"published_at":"2026-10-20T22:20:46+00:00","modified_at":"2026-10-23T21:17:26+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-2026-91428","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91428","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"}