{"id":"CVE-2026-17370","kind":"vulnerability","aliases":["CVE-2026-17370"],"related":[],"title":"IBM API Connect: authenticated user can obtain another user's access token","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 an access token for another user due to improper authentication. The sign-in flow does not sufficiently verify the identity of the user completing it, which could allow another user's identity to be assumed.","summary":"IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 fail to verify the identity of the user completing sign-in. A remote attacker who already has an account can obtain an access token belonging to another user and act as that user.","severity":"medium","cvss":6.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["api-gateway","ibm-api-connect","self-hosted","vendor"],"not_affected_if":["unaffected-versions"],"how_to_check":"- Check the installed API Connect version against the affected ranges: 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2.\n- Review which accounts can sign in to the API Connect management interface and whether any are untrusted.","fix":null,"status":"open","published_at":"2026-11-07T05:18:49+00:00","first_seen_at":"2026-11-07T05:46:05+00:00","triaged_at":"2026-11-07T05:52:38+00:00","updated_at":"2026-11-07T05:52:38+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-11-07T05:52:38Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"IBM API Connect: authenticated user can obtain another user's access token","impact":"high","summary":"IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 fail to verify the identity of the user completing sign-in. A remote attacker who already has an account can obtain an access token belonging to another user and act as that user.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["ibm-api-connect","api-gateway","self-hosted"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"attacker impersonates another user and takes their API Connect access","analyst_note":"Confirm the fixed version and any setting or workaround from the IBM security bulletin for CVE-2026-17370; the NVD entry gives none.","how_to_check":"- Check the installed API Connect version against the affected ranges: 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2.\n- Review which accounts can sign in to the API Connect management interface and whether any are untrusted.","plain_action":"","needs_analyst":true,"not_affected_if":["unaffected-versions"],"who_is_affected":"Organizations running IBM API Connect in the affected version ranges, where users can sign in to the platform. The sources do not describe a non-default configuration requirement. unknown whether a specific deployment mode is required.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000706,"input_tokens":4266,"output_tokens":558,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-17370':15A,18A '-2026':14A,17A '10.0.8.0':34B,78C '10.0.8.12':36B,80C '12.1.0.0':38B,82C '12.1.1.2':40B,84C 'access':11A,64B,94C 'account':60B 'act':71B 'allow':86C,121C 'alreadi':57B 'anoth':8A,68B,97C,122C 'api':2A,20B,24B,31B,76C 'api-gateway':19B 'assum':128C 'attack':55B,90C 'authent':4A,89C,102C 'belong':66B 'complet':49B,117C 'connect':3A,25B,32B,77C 'could':85C,120C 'cve':13A,16A 'due':99C 'fail':41B 'flow':107C 'gateway':21B 'host':28B 'ibm':1A,23B,30B,75C 'ibm-api-connect':22B 'ident':45B,113C,125C 'improp':101C 'obtain':7A,62B,92C 'remot':54B,88C 'self':27B 'self-host':26B 'sign':51B,105C 'sign-in':50B,104C 'suffici':110C 'token':12A,65B,95C 'user':5A,9A,48B,69B,74B,98C,116C,123C 'vendor':29B 'verifi':43B,111C 'version':33B","nicknames":[],"mitigations":[],"who_affected":"Organizations running IBM API Connect in the affected version ranges, where users can sign in to the platform. The sources do not describe a non-default configuration requirement. unknown whether a specific deployment mode is required.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["apigateway","ibmapiconnect","medium","selfhosted","vendor"],"campaign_type":null,"search_a":"'-17370':15A,18A '-2026':14A,17A 'access':11A 'anoth':8A 'api':2A 'authent':4A 'connect':3A 'cve':13A,16A 'ibm':1A 'obtain':7A 'token':12A 'user':5A,9A","search_b":"'10.0.8.0':34B '10.0.8.12':36B '12.1.0.0':38B '12.1.1.2':40B 'access':64B 'account':60B 'act':71B 'alreadi':57B 'anoth':68B 'api':20B,24B,31B 'api-gateway':19B 'attack':55B 'belong':66B 'complet':49B 'connect':25B,32B 'fail':41B 'gateway':21B 'host':28B 'ibm':23B,30B 'ibm-api-connect':22B 'ident':45B 'obtain':62B 'remot':54B 'self':27B 'self-host':26B 'sign':51B 'sign-in':50B 'token':65B 'user':48B,69B,74B 'vendor':29B 'verifi':43B 'version':33B","search_c":"'10.0.8.0':78C '10.0.8.12':80C '12.1.0.0':82C '12.1.1.2':84C 'access':94C 'allow':86C,121C 'anoth':97C,122C 'api':76C 'assum':128C 'attack':90C 'authent':89C,102C 'complet':117C 'connect':77C 'could':85C,120C 'due':99C 'flow':107C 'ibm':75C 'ident':113C,125C 'improp':101C 'obtain':92C 'remot':88C 'sign':105C 'sign-in':104C 'suffici':110C 'token':95C 'user':98C,116C,123C 'verifi':111C","first_public_at":"2026-11-07T05:18:49+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-17370","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17370","severity":null,"published_at":"2026-11-07T05:18:49+00:00","modified_at":"2026-11-07T05:18:49+00:00","first_seen_at":"2026-11-07T05:46:05+00:00","fetched_at":"2026-11-07T05:46:05+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"}