{"id":"CVE-2026-17323","kind":"vulnerability","aliases":["CVE-2026-17323"],"related":[],"title":"IBM API Connect: XML external entity flaw leaks sensitive information remotely","description":"IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information due to XML external entity (XXE) injection.","summary":"IBM API Connect versions 12.1.0.0 through 12.1.1.2 process XML that can reference external entities (XXE injection). A remote attacker can use this to read sensitive information from the server.","severity":"high","cvss":8.2,"epss":null,"exploited":false,"exploited_at":null,"products":[{"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","self-hosted","vendor"],"not_affected_if":["outside-affected-versions"],"how_to_check":"Check the installed API Connect V12 OnPrem version; versions v12.1.0.0 through v12.1.1.2 are affected, v12.1.1.3 contains the fix.","fix":"Upgrade IBM API Connect to v12.1.1.3 (Fix Central: https://www.ibm.com/support/pages/node/7290205). IBM lists no workarounds or interim fixes.","status":"open","published_at":"2026-11-07T05:18:42+00:00","first_seen_at":"2026-11-07T05:46:03+00:00","triaged_at":"2026-11-07T05:50:26+00:00","updated_at":"2026-11-07T06:18:29+00:00","category":"vendor","confidence":0.85,"triage":{"at":"2026-11-07T05:50:26Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"IBM API Connect: XML external entity flaw leaks sensitive information remotely","impact":"medium","summary":"IBM API Connect versions 12.1.0.0 through 12.1.1.2 process XML that can reference external entities (XXE injection). A remote attacker can use this to read sensitive information from the server.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["ibm-api-connect","api-gateway","self-hosted"],"confidence":0.6,"fix_status":"unknown","needs_auth":"unknown","worst_case":"remote attacker reads sensitive server information via XML entities","analyst_note":"Check the IBM security bulletin for this CVE to confirm the fixed version, required privileges and whether the XML endpoint is default-enabled.","how_to_check":"- Check the installed IBM API Connect version against the affected range `12.1.0.0` through `12.1.1.2`\n- unknown","plain_action":"","needs_analyst":true,"not_affected_if":["outside-affected-versions"],"who_is_affected":"IBM API Connect deployments in the affected 12.1 range that accept XML input from remote clients are exposed. Teams running other API Connect versions or not using API Connect can skip it. The sources do not describe specific configuration conditions.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000667,"input_tokens":4195,"output_tokens":495,"severity_before":"high"},"analyst_status":"done","analyst_note":"Check the IBM security bulletin for this CVE to confirm the fixed version, required privileges and whether the XML endpoint is default-enabled.","search":"'-17323':14A,17A '-2026':13A,16A '12.1.0.0':37B,65C '12.1.1.2':39B,67C 'allow':69C 'api':2A,18A,23B,27B,34B,63C 'api-gateway':22B 'attack':51B,72C 'connect':3A,19A,28B,35B,64C 'could':68C 'cve':12A,15A 'due':77C 'entiti':6A,46B,81C 'extern':5A,45B,80C 'flaw':7A 'gateway':24B 'host':31B 'ibm':1A,26B,33B,62C 'ibm-api-connect':25B 'inform':10A,58B,76C 'inject':48B,83C 'leak':8A 'obtain':74C 'onprem':21A 'process':40B 'read':56B 'refer':44B 'remot':11A,50B,71C 'self':30B 'self-host':29B 'sensit':9A,57B,75C 'server':61B 'use':53B 'v12':20A 'vendor':32B 'version':36B 'xml':4A,41B,79C 'xxe':47B,82C","nicknames":[],"mitigations":[],"who_affected":"Self-hosted (OnPrem) IBM API Connect V12 deployments running v12.1.0.0 through v12.1.1.2 are affected. IBM rates it as exploitable over the network without authentication or user interaction, so an attacker could read sensitive data and cause limited availability impact. IBM's bulletin does not say which endpoints parse XML or whether it depends on configuration. Teams on other versions, or not using API Connect, can skip it.","tier":"B","verified":{"fix":{"at":"2026-11-07T06:18:29Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295635","run_id":2045},"products":{"at":"2026-11-07T06:18:29Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295635","run_id":2045},"how_to_check":{"at":"2026-11-07T06:18:29Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295635","run_id":2045},"who_affected":{"at":"2026-11-07T06:18:29Z","by":"analyst","doc":"https://www.ibm.com/support/pages/node/7295635","run_id":2045}},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["apiconnectv12onprem","connectv12onprem"],"ptokens":["api","connect","onprem","v12"],"labels":["apigateway","high","ibmapiconnect","selfhosted","vendor"],"campaign_type":null,"search_a":"'-17323':14A,17A '-2026':13A,16A 'api':2A,18A 'connect':3A,19A 'cve':12A,15A 'entiti':6A 'extern':5A 'flaw':7A 'ibm':1A 'inform':10A 'leak':8A 'onprem':21A 'remot':11A 'sensit':9A 'v12':20A 'xml':4A","search_b":"'12.1.0.0':37B '12.1.1.2':39B 'api':23B,27B,34B 'api-gateway':22B 'attack':51B 'connect':28B,35B 'entiti':46B 'extern':45B 'gateway':24B 'host':31B 'ibm':26B,33B 'ibm-api-connect':25B 'inform':58B 'inject':48B 'process':40B 'read':56B 'refer':44B 'remot':50B 'self':30B 'self-host':29B 'sensit':57B 'server':61B 'use':53B 'vendor':32B 'version':36B 'xml':41B 'xxe':47B","search_c":"'12.1.0.0':65C '12.1.1.2':67C 'allow':69C 'api':63C 'attack':72C 'connect':64C 'could':68C 'due':77C 'entiti':81C 'extern':80C 'ibm':62C 'inform':76C 'inject':83C 'obtain':74C 'remot':71C 'sensit':75C 'xml':79C 'xxe':82C","first_public_at":"2026-11-07T05:18:42+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-17323","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17323","severity":null,"published_at":"2026-11-07T05:18:42+00:00","modified_at":"2026-11-07T05:18:42+00:00","first_seen_at":"2026-11-07T05:46:03+00:00","fetched_at":"2026-11-07T05:46:03+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-17323:2045","url":"https://www.ibm.com/support/pages/node/7295635","severity":null,"published_at":"2026-11-07T06:18:29+00:00","modified_at":"2026-11-07T06:18:29+00:00","first_seen_at":"2026-11-07T06:18:29+00:00","fetched_at":"2026-11-07T06:18:29+00:00","note":"Read IBM bulletin node/7295635: affected API Connect V12 OnPrem v12.1.0.0-v12.1.1.2, fix v12.1.1.3 (Fix Central node/7290205), no workarounds/interim fixes. CVSS PR:N, unauthenticated, CWE-611. No exploitation/PoC found. Default-enabled XML endpoint not stated.","cites":["https://www.ibm.com/support/pages/node/7295635"]}],"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}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}