{"id":"CVE-2026-17066","kind":"vulnerability","aliases":["CVE-2026-17066"],"related":[],"title":"IBM API Connect: missing authorization exposes other tenants' data to attackers","description":"IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information and modify or delete data belonging to other tenants due to missing authorization.","summary":"IBM API Connect versions 12.1.0.0 through 12.1.1.2 lack an authorization check, so a logged-in user can read, modify or delete data belonging to other tenants. The attacker needs a valid account on the platform, and the impact is cross-tenant data exposure and tampering.","severity":"critical","cvss":9.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["api-connect","ibm","multi-tenant","self-hosted","vendor"],"not_affected_if":["no-authenticated-users","single-tenant","version-outside-range"],"how_to_check":"- Check the installed API Connect version in the management console or product documentation; the affected range is `12.1.0.0` through `12.1.1.2`.\n- Confirm whether the deployment is multi-tenant, since cross-tenant access only matters when several tenants share the platform.","fix":"- Move to a release newer than `12.1.1.2` as stated in IBM's advisory; the exact fixed version is unknown from the sources.","status":"open","published_at":"2026-11-07T05:18:23+00:00","first_seen_at":"2026-11-07T05:45:58+00:00","triaged_at":"2026-11-07T05:48:42+00:00","updated_at":"2026-11-07T05:48:42+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-11-07T05:48:42Z","model":"claude-haiku-5-5","output":{"fix":"- Move to a release newer than `12.1.1.2` as stated in IBM's advisory; the exact fixed version is unknown from the sources.","reach":"internet","title":"IBM API Connect: missing authorization exposes other tenants' data to attackers","impact":"high","summary":"IBM API Connect versions 12.1.0.0 through 12.1.1.2 lack an authorization check, so a logged-in user can read, modify or delete data belonging to other tenants. The attacker needs a valid account on the platform, and the impact is cross-tenant data exposure and tampering.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["ibm","api-connect","multi-tenant","self-hosted"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"authenticated attacker reads, changes or deletes other tenants' data","analyst_note":"Confirm the fixed version and the IBM security bulletin for CVE-2026-17066; sources only give the affected range.","how_to_check":"- Check the installed API Connect version in the management console or product documentation; the affected range is `12.1.0.0` through `12.1.1.2`.\n- Confirm whether the deployment is multi-tenant, since cross-tenant access only matters when several tenants share the platform.","plain_action":"","needs_analyst":true,"not_affected_if":["version-outside-range","single-tenant","no-authenticated-users"],"who_is_affected":"Organizations running IBM API Connect 12.1.0.0 through 12.1.1.2, especially multi-tenant deployments where several teams or customers share one instance. Single-tenant installs on other versions are not in the stated range. The attacker must already hold an authenticated account on the platform.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.00074,"input_tokens":4207,"output_tokens":639,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-17066':14A,17A '-2026':13A,16A '12.1.0.0':33B,79C '12.1.1.2':35B,81C 'account':61B 'allow':83C 'api':2A,19B,30B,77C 'api-connect':18B 'attack':11A,57B,87C 'authent':86C 'author':5A,38B,104C 'belong':52B,97C 'check':39B 'connect':3A,20B,31B,78C 'could':82C 'cross':70B 'cross-ten':69B 'cve':12A,15A 'data':9A,51B,72B,96C 'delet':50B,95C 'due':101C 'expos':6A 'exposur':73B 'host':27B 'ibm':1A,21B,29B,76C 'impact':67B 'inform':91C 'lack':36B 'log':43B 'logged-in':42B 'miss':4A,103C 'modifi':48B,93C 'multi':23B 'multi-ten':22B 'need':58B 'obtain':89C 'platform':64B 'read':47B 'remot':85C 'self':26B 'self-host':25B 'sensit':90C 'tamper':75B 'tenant':8A,24B,55B,71B,100C 'user':45B 'valid':60B 'vendor':28B 'version':32B","nicknames":[],"mitigations":[],"who_affected":"Organizations running IBM API Connect 12.1.0.0 through 12.1.1.2, especially multi-tenant deployments where several teams or customers share one instance. Single-tenant installs on other versions are not in the stated range. The attacker must already hold an authenticated account on the platform.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["apiconnect","critical","ibm","multitenant","selfhosted","vendor"],"campaign_type":null,"search_a":"'-17066':14A,17A '-2026':13A,16A 'api':2A 'attack':11A 'author':5A 'connect':3A 'cve':12A,15A 'data':9A 'expos':6A 'ibm':1A 'miss':4A 'tenant':8A","search_b":"'12.1.0.0':33B '12.1.1.2':35B 'account':61B 'api':19B,30B 'api-connect':18B 'attack':57B 'author':38B 'belong':52B 'check':39B 'connect':20B,31B 'cross':70B 'cross-ten':69B 'data':51B,72B 'delet':50B 'exposur':73B 'host':27B 'ibm':21B,29B 'impact':67B 'lack':36B 'log':43B 'logged-in':42B 'modifi':48B 'multi':23B 'multi-ten':22B 'need':58B 'platform':64B 'read':47B 'self':26B 'self-host':25B 'tamper':75B 'tenant':24B,55B,71B 'user':45B 'valid':60B 'vendor':28B 'version':32B","search_c":"'12.1.0.0':79C '12.1.1.2':81C 'allow':83C 'api':77C 'attack':87C 'authent':86C 'author':104C 'belong':97C 'connect':78C 'could':82C 'data':96C 'delet':95C 'due':101C 'ibm':76C 'inform':91C 'miss':103C 'modifi':93C 'obtain':89C 'remot':85C 'sensit':90C 'tenant':100C","first_public_at":"2026-11-07T05:18:23+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-17066","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17066","severity":null,"published_at":"2026-11-07T05:18:23+00:00","modified_at":"2026-11-07T05:18:23+00:00","first_seen_at":"2026-11-07T05:45:58+00:00","fetched_at":"2026-11-07T05:45:58+00:00","note":null}],"documents":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}