{"id":"CVE-2026-16712","kind":"vulnerability","aliases":["CVE-2026-16712"],"related":[],"title":"IBM API Connect: authenticated users can read other tenants' data","description":"IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information from other tenants due to improper authorization. Identifiers supplied in requests are not sufficiently checked against the user's permissions, which could allow access to data belonging to other tenants.","summary":"IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 do not check request identifiers against the caller's permissions. A logged-in attacker can read sensitive information belonging to other tenants.","severity":"high","cvss":7.7,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"API Connect","fixed":["10.0.8.13"],"affected":">= 10.0.8.0, <= 10.0.8.12","ecosystem":"vendor"},{"name":"API Connect V12 OnPrem","fixed":["12.1.1.3"],"affected":">= 12.1.0.0, <= 12.1.1.2","ecosystem":"vendor"}],"ecosystems":[],"tags":["api-gateway","ibm-api-connect","infrastructure","multi-tenant"],"not_affected_if":["single-tenant","unaffected-version"],"how_to_check":"Check your API Connect version. Affected: V10.0.8.0 through 10.0.8.12, and V12 OnPrem 12.1.0.0 through 12.1.1.2. Fixed in 10.0.8.13 and 12.1.1.3. IBM's V12 bulletin names the V12 OnPrem product; also check any other V12 deployment type you run.","fix":"Upgrade API Connect 12.1.x to 12.1.1.3 (Fix Central: https://www.ibm.com/support/pages/node/7290205) or 10.0.8.x to 10.0.8.13. IBM lists no workarounds or mitigations.","status":"open","published_at":"2026-11-07T05:18:20+00:00","first_seen_at":"2026-11-07T05:45:57+00:00","triaged_at":"2026-11-07T05:52:01+00:00","updated_at":"2026-11-07T06:27:33+00:00","category":"infrastructure","confidence":0.85,"triage":{"at":"2026-11-07T05:52:01Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"IBM API Connect: authenticated users can read other tenants' data","impact":"medium","summary":"IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 do not check request identifiers against the caller's permissions. A logged-in attacker can read sensitive information belonging to other tenants.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["ibm-api-connect","multi-tenant","api-gateway"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Authenticated user reads sensitive data of other tenants.","analyst_note":"Check the IBM security bulletin for the fixed version and whether single-tenant deployments are affected.","how_to_check":"- Check the installed API Connect version against the affected ranges in the IBM advisory.\n- unknown for other checks; the sources do not say.","plain_action":"","needs_analyst":true,"not_affected_if":["single-tenant","unaffected-version"],"who_is_affected":"Organisations running IBM API Connect in a multi-tenant setup within the affected version ranges. Single-tenant deployments are likely lower risk, but the sources do not say. Teams on other versions can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000676,"input_tokens":4272,"output_tokens":498,"severity_before":"high"},"analyst_status":"done","analyst_note":"Check the IBM security bulletin for the fixed version and whether single-tenant deployments are affected.","search":"'-16712':13A,16A '-2026':12A,15A '10.0.8.0':38B,71C '10.0.8.12':40B,73C '12.1.0.0':42B,75C '12.1.1.2':44B,77C 'access':111C 'allow':79C,110C 'api':2A,17A,19A,24B,28B,35B,69C 'api-gateway':23B 'attack':59B,83C 'authent':4A,82C 'author':94C 'belong':64B,114C 'caller':52B 'check':47B,102C 'connect':3A,18A,20A,29B,36B,70C 'could':78C,109C 'cve':11A,14A 'data':10A,113C 'due':91C 'gateway':25B 'ibm':1A,27B,34B,68C 'ibm-api-connect':26B 'identifi':49B,95C 'improp':93C 'inform':63B,87C 'infrastructur':30B 'log':57B 'logged-in':56B 'multi':32B 'multi-ten':31B 'obtain':85C 'onprem':22A 'permiss':54B,107C 'read':7A,61B 'remot':81C 'request':48B,98C 'sensit':62B,86C 'suffici':101C 'suppli':96C 'tenant':9A,33B,67B,90C,117C 'user':5A,105C 'v12':21A 'version':37B","nicknames":[],"mitigations":[],"who_affected":"Teams running IBM API Connect 10.0.8.0 to 10.0.8.12 or V12 OnPrem 12.1.0.0 to 12.1.1.2 where more than one tenant shares the deployment. Any logged-in user could read another tenant's data by supplying identifiers the product does not check against their permissions. IBM's bulletins do not say whether single-tenant installs are affected, so treat them as exposed to any authenticated user until you upgrade. Teams on 10.0.8.13 / 12.1.1.3 or later can skip it.","tier":"B","verified":{"fix":{"at":"2026-11-07T06:27:33Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295637","run_id":2078},"products":{"at":"2026-11-07T06:27:33Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295637","run_id":2078},"workarounds":{"at":"2026-11-07T06:27:33Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295637","run_id":2078},"how_to_check":{"at":"2026-11-07T06:27:33Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295637","run_id":2078},"who_affected":{"at":"2026-11-07T06:27:33Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295637","run_id":2078}},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["apiconnect","apiconnectv12onprem","connect","connectv12onprem"],"ptokens":["api","connect","onprem","v12"],"labels":["apigateway","high","ibmapiconnect","infrastructure","multitenant"],"campaign_type":null,"search_a":"'-16712':13A,16A '-2026':12A,15A 'api':2A,17A,19A 'authent':4A 'connect':3A,18A,20A 'cve':11A,14A 'data':10A 'ibm':1A 'onprem':22A 'read':7A 'tenant':9A 'user':5A 'v12':21A","search_b":"'10.0.8.0':38B '10.0.8.12':40B '12.1.0.0':42B '12.1.1.2':44B 'api':24B,28B,35B 'api-gateway':23B 'attack':59B 'belong':64B 'caller':52B 'check':47B 'connect':29B,36B 'gateway':25B 'ibm':27B,34B 'ibm-api-connect':26B 'identifi':49B 'inform':63B 'infrastructur':30B 'log':57B 'logged-in':56B 'multi':32B 'multi-ten':31B 'permiss':54B 'read':61B 'request':48B 'sensit':62B 'tenant':33B,67B 'version':37B","search_c":"'10.0.8.0':71C '10.0.8.12':73C '12.1.0.0':75C '12.1.1.2':77C 'access':111C 'allow':79C,110C 'api':69C 'attack':83C 'authent':82C 'author':94C 'belong':114C 'check':102C 'connect':70C 'could':78C,109C 'data':113C 'due':91C 'ibm':68C 'identifi':95C 'improp':93C 'inform':87C 'obtain':85C 'permiss':107C 'remot':81C 'request':98C 'sensit':86C 'suffici':101C 'suppli':96C 'tenant':90C,117C 'user':105C","first_public_at":"2026-11-07T05:18:20+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":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-16712","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16712","severity":null,"published_at":"2026-11-07T05:18:20+00:00","modified_at":"2026-11-07T05:18:20+00:00","first_seen_at":"2026-11-07T05:45:57+00:00","fetched_at":"2026-11-07T05:45:57+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-16712:2078","url":"https://www.ibm.com/support/pages/node/7295635","severity":null,"published_at":"2026-11-07T06:27:33+00:00","modified_at":"2026-11-07T06:27:33+00:00","first_seen_at":"2026-11-07T06:27:33+00:00","fetched_at":"2026-11-07T06:27:33+00:00","note":"Read both IBM bulletins (nodes 7295635 for V12, 7295637 for V10) via the CVE's references. Fix 12.1.1.3 / 10.0.8.13, no workarounds. IBM does not say whether single-tenant installs are affected; removed that not-affected tag. No exploitation or PoC found; did not search social.","cites":["https://www.ibm.com/support/pages/node/7295635","https://www.ibm.com/support/pages/node/7295637"]}],"documents":[{"id":92834,"url":"https://www.ibm.com/support/pages/node/7295635","title":"IBM Security Bulletin: Multiple Vulnerabilities in IBM API Connect (v12.1.1.3)","kind":"advisory","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":93164,"url":"https://www.ibm.com/support/pages/node/7295637","title":"IBM Security Bulletin: Multiple Vulnerabilities in IBM API Connect (10.0.8.13)","kind":"advisory","source":"analyst","publisher":null,"text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}