{"id":"CVE-2026-3161","kind":"vulnerability","aliases":["CVE-2026-3161"],"related":[],"title":"IBM Cloud Pak System: weak cryptography lets attackers decrypt sensitive information","description":"IBM Cloud Pak System 2.3.6.0, and 2.3.6.1 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.","summary":"IBM Cloud Pak System versions 2.3.6.0 and 2.3.6.1 use cryptographic algorithms weaker than expected. An attacker who captures encrypted data could decrypt highly sensitive information.","severity":"medium","cvss":5.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["appliance","ibm-cloud-pak-system","infrastructure"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-19T18:17:07+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","triaged_at":"2026-10-25T04:08:43+00:00","updated_at":"2026-10-25T04:08:43+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-25T04:08:43Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"unknown","title":"IBM Cloud Pak System: weak cryptography lets attackers decrypt sensitive information","impact":"medium","summary":"IBM Cloud Pak System versions 2.3.6.0 and 2.3.6.1 use cryptographic algorithms weaker than expected. An attacker who captures encrypted data could decrypt highly sensitive information.","category":"infrastructure","nicknames":[],"who_cares":["ibm-cloud-pak-system","appliance"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker decrypts highly sensitive information protected by weak cryptography","analyst_note":"Find IBM's security bulletin for CVE-2026-3161 to get the fixed version, the affected component and the exposure path.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Teams running IBM Cloud Pak System 2.3.6.0 or 2.3.6.1 appliances. The sources do not describe which data paths or configurations are exposed, so unknown.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000542,"input_tokens":3301,"output_tokens":424,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-3161':14A,17A '2.3.6.0':30B,54C '2.3.6.1':32B,56C 'algorithm':35B,62C 'allow':65C 'applianc':18B 'attack':8A,40B,67C 'captur':42B 'cloud':2A,21B,26B,51C 'could':45B,64C 'cryptograph':34B,61C 'cryptographi':6A 'cve':12A,15A 'data':44B 'decrypt':9A,46B,69C 'encrypt':43B 'expect':38B,60C 'high':47B,70C 'ibm':1A,20B,25B,50C 'ibm-cloud-pak-system':19B 'inform':11A,49B,72C 'infrastructur':24B 'let':7A 'pak':3A,22B,27B,52C 'sensit':10A,48B,71C 'system':4A,23B,28B,53C 'use':33B,57C 'version':29B 'weak':5A 'weaker':36B,58C","nicknames":[],"mitigations":[],"who_affected":"Teams running IBM Cloud Pak System 2.3.6.0 or 2.3.6.1 appliances. The sources do not describe which data paths or configurations are exposed, so unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T18:17:07+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-3161","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3161","severity":null,"published_at":"2026-10-19T18:17:07+00:00","modified_at":"2026-10-22T21:17:18+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","fetched_at":"2026-10-23T22:28:57+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"}