{"id":"CVE-2026-17401","kind":"vulnerability","aliases":["CVE-2026-17401"],"related":[],"title":"IBM API Connect: stack buffer overflow lets signed-in attacker run code","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 execute arbitrary code due to a stack-based buffer overflow.","summary":"IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 contain a stack-based buffer overflow. A remote attacker with a valid account could exploit it to execute arbitrary code.","severity":"high","cvss":7.2,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"API Connect","fixed":["10.0.8.13","12.1.1.3"],"affected":">= 10.0.8.0, <= 10.0.8.12 || >= 12.1.0.0, <= 12.1.1.2","ecosystem":"vendor"}],"ecosystems":[],"tags":["api-gateway","authenticated","ibm-api-connect","self-hosted","vendor"],"not_affected_if":["version-outside-affected-ranges"],"how_to_check":"Check your installed API Connect version. Affected: 10.0.8.0 through 10.0.8.12, and 12.1.0.0 through 12.1.1.2 (IBM lists these as API Connect V12 OnPrem). Fixed: 10.0.8.13 and 12.1.1.3.","fix":"Upgrade API Connect V12 to 12.1.1.3 (Fix Central: https://www.ibm.com/support/pages/node/7290205), or the 10.0.8 line to 10.0.8.13. IBM lists no workaround.","status":"open","published_at":"2026-11-07T05:18:56+00:00","first_seen_at":"2026-11-07T05:46:07+00:00","triaged_at":"2026-11-07T05:52:13+00:00","updated_at":"2026-11-07T06:05:53+00:00","category":"vendor","confidence":0.85,"triage":{"at":"2026-11-07T05:52:13Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"IBM API Connect: stack buffer overflow lets signed-in attacker run code","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 contain a stack-based buffer overflow. A remote attacker with a valid account could exploit it to execute arbitrary code.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["ibm-api-connect","api-gateway"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Attacker runs arbitrary code on the API Connect server","analyst_note":"Find IBM's security bulletin for CVE-2026-17401 to confirm fixed versions, the affected component and any setting required to be exposed.","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- unknown for other checks; the sources do not say which component or configuration exposes the flaw.","plain_action":"","needs_analyst":true,"not_affected_if":["version-outside-affected-ranges"],"who_is_affected":"Organizations running IBM API Connect in the affected version ranges, reachable by authenticated remote users. The sources do not say which component or configuration is involved, so whether a given deployment is reachable is unknown.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000699,"input_tokens":4229,"output_tokens":552,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find IBM's security bulletin for CVE-2026-17401 to confirm fixed versions, the affected component and any setting required to be exposed.","search":"'-17401':16A,19A '-2026':15A,18A '10.0.8.0':38B,69C '10.0.8.12':40B,71C '12.1.0.0':42B,73C '12.1.1.2':44B,75C 'account':58B 'allow':77C 'api':2A,20A,23B,28B,35B,67C 'api-gateway':22B 'arbitrari':64B,84C 'attack':11A,54B,81C 'authent':25B,80C 'base':49B,91C 'buffer':5A,50B,92C 'code':13A,65B,85C 'connect':3A,21A,29B,36B,68C 'contain':45B 'could':59B,76C 'cve':14A,17A 'due':86C 'execut':63B,83C 'exploit':60B 'gateway':24B 'host':32B 'ibm':1A,27B,34B,66C 'ibm-api-connect':26B 'let':7A 'overflow':6A,51B,93C 'remot':53B,79C 'run':12A 'self':31B 'self-host':30B 'sign':9A 'signed-in':8A 'stack':4A,48B,90C 'stack-bas':47B,89C 'valid':57B 'vendor':33B 'version':37B","nicknames":[],"mitigations":[],"who_affected":"Self-managed (on-prem) IBM API Connect 10.0.8.0 to 10.0.8.12 and 12.1.0.0 to 12.1.1.2. An attacker needs a valid account with high privileges (CVSS PR:H) and network access, and a successful attack could run code on the system. IBM does not name the affected component or any required setting. Deployments already on 10.0.8.13 or 12.1.1.3 can skip it.","tier":"B","verified":{"fix":{"at":"2026-11-07T06:05:53Z","by":"analyst","doc":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","run_id":2007},"products":{"at":"2026-11-07T06:05:53Z","by":"analyst","doc":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","run_id":2007},"mitigations":{"at":"2026-11-07T06:05:53Z","by":"analyst","doc":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","run_id":2007},"workarounds":{"at":"2026-11-07T06:05:53Z","by":"analyst","doc":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","run_id":2007},"how_to_check":{"at":"2026-11-07T06:05:53Z","by":"analyst","doc":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","run_id":2007},"who_affected":{"at":"2026-11-07T06:05:53Z","by":"analyst","doc":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","run_id":2007}},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["apiconnect","connect"],"ptokens":["api","connect"],"labels":["apigateway","authenticated","high","ibmapiconnect","selfhosted","vendor"],"campaign_type":null,"search_a":"'-17401':16A,19A '-2026':15A,18A 'api':2A,20A 'attack':11A 'buffer':5A 'code':13A 'connect':3A,21A 'cve':14A,17A 'ibm':1A 'let':7A 'overflow':6A 'run':12A 'sign':9A 'signed-in':8A 'stack':4A","search_b":"'10.0.8.0':38B '10.0.8.12':40B '12.1.0.0':42B '12.1.1.2':44B 'account':58B 'api':23B,28B,35B 'api-gateway':22B 'arbitrari':64B 'attack':54B 'authent':25B 'base':49B 'buffer':50B 'code':65B 'connect':29B,36B 'contain':45B 'could':59B 'execut':63B 'exploit':60B 'gateway':24B 'host':32B 'ibm':27B,34B 'ibm-api-connect':26B 'overflow':51B 'remot':53B 'self':31B 'self-host':30B 'stack':48B 'stack-bas':47B 'valid':57B 'vendor':33B 'version':37B","search_c":"'10.0.8.0':69C '10.0.8.12':71C '12.1.0.0':73C '12.1.1.2':75C 'allow':77C 'api':67C 'arbitrari':84C 'attack':81C 'authent':80C 'base':91C 'buffer':92C 'code':85C 'connect':68C 'could':76C 'due':86C 'execut':83C 'ibm':66C 'overflow':93C 'remot':79C 'stack':90C 'stack-bas':89C","first_public_at":"2026-11-07T05:18:56+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-17401","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17401","severity":null,"published_at":"2026-11-07T05:18:56+00:00","modified_at":"2026-11-07T05:18:56+00:00","first_seen_at":"2026-11-07T05:46:07+00:00","fetched_at":"2026-11-07T05:46:07+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-17401:2007","url":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39","severity":null,"published_at":"2026-11-07T06:05:53+00:00","modified_at":"2026-11-07T06:05:53+00:00","first_seen_at":"2026-11-07T06:05:53+00:00","fetched_at":"2026-11-07T06:05:53+00:00","note":"Both IBM bulletins (-39 for V12, -41 for 10.0.8) list CVE-2026-17401 (CWE-121, CVSS 7.2, PR:H). Fix: 12.1.1.3 / 10.0.8.13; workarounds: None. IBM gives no component or setting. -41 metadata says 10.0.8.0-10.0.8.13 but its table says through 10.0.8.12.","cites":["https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39","https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41"]}],"documents":[{"id":93149,"url":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39","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":93150,"url":"https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41","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"}