{"id":"CVE-2026-107674","kind":"vulnerability","aliases":["CVE-2026-107674"],"related":[],"title":"IBM i: Digital Certificate Manager flaw can block or downgrade secure connections","description":"IBM i 7.3, 7.4, 7.5, and 7.6 is vulnerable to a denial of service to Digital Certificate Manager (DCM) for System TLS using applications attempting to create secure network connections. A bad actor could use this to prevent a service from starting or cause it to fallback to non-secure connections.","summary":"IBM i versions 7.3 through 7.6 have a flaw in Digital Certificate Manager for System TLS that affects applications creating secure network connections. An attacker can deny service by stopping a service from starting, or force applications to fall back to non-secure connections.","severity":"medium","cvss":5.1,"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":["digital-certificate-manager","ibm-i","infrastructure","system-tls"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-16T19:17:02+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","triaged_at":"2026-10-25T04:29:13+00:00","updated_at":"2026-10-25T04:29:13+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-25T04:29:13Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"network","title":"IBM i: Digital Certificate Manager flaw can block or downgrade secure connections","impact":"medium","summary":"IBM i versions 7.3 through 7.6 have a flaw in Digital Certificate Manager for System TLS that affects applications creating secure network connections. An attacker can deny service by stopping a service from starting, or force applications to fall back to non-secure connections.","category":"infrastructure","nicknames":[],"who_cares":["ibm-i","system-tls","digital-certificate-manager"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Services fail to start or connections silently fall back to plaintext","analyst_note":"Check the IBM security bulletin for CVE-2026-107674 for fixed PTF levels per release and the exact trigger conditions; NVD alone gives no fix or check details.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"IBM i systems on releases 7.3, 7.4, 7.5 or 7.6 that run applications using System TLS through Digital Certificate Manager to open secure network connections are in scope. Teams on other IBM i releases or without System TLS-dependent services can likely skip it. The sources do not say which configurations trigger the flaw.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00059,"input_tokens":3427,"output_tokens":494,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-107674':15A,18A '-2026':14A,17A '7.3':41B,85C '7.4':86C '7.5':87C '7.6':43B,89C 'actor':115C 'affect':55B 'applic':56B,74B,106C 'attack':62B 'attempt':107C 'back':77B 'bad':114C 'block':8A 'caus':126C 'certif':4A,29B,49B,99C 'connect':12A,60B,82B,112C,134C 'could':116C 'creat':57B,109C 'cve':13A,16A 'dcm':101C 'deni':64B 'denial':94C 'digit':3A,28B,48B,98C 'digital-certificate-manag':27B 'downgrad':10A 'fall':76B 'fallback':129C 'flaw':6A,46B 'forc':73B 'i':20A,22A,24A,26A 'ibm':1A,19A,21A,23A,25A,32B,38B,83C 'ibm-i':31B 'infrastructur':34B 'manag':5A,30B,50B,100C 'network':59B,111C 'non':80B,132C 'non-secur':79B,131C 'prevent':120C 'secur':11A,58B,81B,110C,133C 'servic':65B,69B,96C,122C 'start':71B,124C 'stop':67B 'system':36B,52B,103C 'system-tl':35B 'tls':37B,53B,104C 'use':105C,117C 'version':40B 'vulner':91C","nicknames":[],"mitigations":[],"who_affected":"IBM i systems on releases 7.3, 7.4, 7.5 or 7.6 that run applications using System TLS through Digital Certificate Manager to open secure network connections are in scope. Teams on other IBM i releases or without System TLS-dependent services can likely skip it. The sources do not say which configurations trigger the flaw.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T19:17:02+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-107674","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107674","severity":null,"published_at":"2026-10-16T19:17:02+00:00","modified_at":"2026-10-23T16:05:39+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"}