{"id":"CVE-2026-17275","kind":"vulnerability","aliases":["CVE-2026-17275"],"related":[],"title":"IBM i: remote attacker can manipulate distributed transactions via transaction identifiers","description":"IBM i 7.3, 7.4, 7.5, and 7.6 could allow a remote attacker to perform unauthorized manipulation of distributed transactions due to improper validation of attacker-supplied transaction identifiers.","summary":"IBM i 7.3 through 7.6 does not properly validate transaction identifiers supplied by a remote client. A remote attacker can therefore tamper with distributed transactions they should not be able to change.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"ibm i","fixed":[],"affected":"= 7.3","ecosystem":"vendor"},{"name":"ibm i","fixed":[],"affected":"= 7.4","ecosystem":"vendor"},{"name":"ibm i","fixed":[],"affected":"= 7.5","ecosystem":"vendor"},{"name":"ibm i","fixed":[],"affected":"= 7.6","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["as400","distributed-transactions","ibm-i","infrastructure"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-16T19:17:06+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","triaged_at":"2026-10-25T04:26:57+00:00","updated_at":"2026-10-25T04:26:57+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-25T04:26:57Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"IBM i: remote attacker can manipulate distributed transactions via transaction identifiers","impact":"medium","summary":"IBM i 7.3 through 7.6 does not properly validate transaction identifiers supplied by a remote client. A remote attacker can therefore tamper with distributed transactions they should not be able to change.","category":"infrastructure","nicknames":[],"who_cares":["ibm-i","as400","distributed-transactions"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Remote attacker manipulates distributed transactions without authorization","analyst_note":"Find the IBM security bulletin for CVE-2026-17275 to get fixed versions, PTF numbers and which distributed transaction services are exposed.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"IBM i 7.3, 7.4, 7.5 and 7.6 systems that handle distributed transactions over the network. The sources do not say which services or configurations are exposed, so whether a given system is affected is unknown.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000551,"input_tokens":3392,"output_tokens":423,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-17275':14A,17A '-2026':13A,16A '7.3':36B,68C '7.4':69C '7.5':70C '7.6':38B,72C 'abl':63B 'allow':74C 'as400':26B 'attack':4A,52B,77C,91C 'attacker-suppli':90C 'chang':65B 'client':49B 'could':73C 'cve':12A,15A 'distribut':7A,28B,57B,83C 'distributed-transact':27B 'due':85C 'i':19A,21A,23A,25A 'ibm':1A,18A,20A,22A,24A,31B,34B,66C 'ibm-i':30B 'identifi':11A,44B,94C 'improp':87C 'infrastructur':33B 'manipul':6A,81C 'perform':79C 'proper':41B 'remot':3A,48B,51B,76C 'suppli':45B,92C 'tamper':55B 'therefor':54B 'transact':8A,10A,29B,43B,58B,84C,93C 'unauthor':80C 'valid':42B,88C 'via':9A","nicknames":[],"mitigations":[],"who_affected":"IBM i 7.3, 7.4, 7.5 and 7.6 systems that handle distributed transactions over the network. The sources do not say which services or configurations are exposed, so whether a given system is affected is unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T19:17:06+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-17275","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17275","severity":null,"published_at":"2026-10-16T19:17:06+00:00","modified_at":"2026-10-23T15:52:57+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}