{"id":"CVE-2026-1501","kind":"vulnerability","aliases":["CVE-2026-1501"],"related":[],"title":"IBM Concert: improper certificate validation weakens connection security","description":"IBM Concert 1.0 through 3.0.0 is vulnerable to Improper Certificate Validation.","summary":"IBM Concert versions 1.0 through 3.0.0 do not properly validate certificates. An attacker positioned on the network path could potentially impersonate a service and intercept traffic.","severity":"low","cvss":3.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ibm-concert","self-hosted","vendor"],"not_affected_if":[],"how_to_check":"- Check the installed IBM Concert version against the affected range 1.0 through 3.0.0\n- unknown","fix":"- Move IBM Concert to a version newer than `3.0.0` once IBM publishes a fixed release\n- unknown","status":"open","published_at":"2026-10-19T18:17:06+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","triaged_at":"2026-10-25T04:44:04+00:00","updated_at":"2026-10-25T04:44:04+00:00","category":"vendor","confidence":0.4,"triage":{"at":"2026-10-25T04:44:04Z","model":"claude-haiku-5-5","output":{"fix":"- Move IBM Concert to a version newer than `3.0.0` once IBM publishes a fixed release\n- unknown","reach":"network","title":"IBM Concert: improper certificate validation weakens connection security","impact":"medium","summary":"IBM Concert versions 1.0 through 3.0.0 do not properly validate certificates. An attacker positioned on the network path could potentially impersonate a service and intercept traffic.","category":"vendor","nicknames":[],"who_cares":["ibm-concert","self-hosted"],"confidence":0.4,"needs_auth":"unknown","worst_case":"Traffic could be intercepted or services impersonated on the network path","analyst_note":"Check the IBM security bulletin for CVE-2026-1501 to learn which connections are affected, the fixed version, and any workaround.","how_to_check":"- Check the installed IBM Concert version against the affected range 1.0 through 3.0.0\n- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"IBM Concert deployments in the affected range 1.0 through 3.0.0 are potentially affected. The sources do not describe the specific data path or configuration that makes an installation exposed, so whether a given team is at risk is unknown.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.00056,"input_tokens":3252,"output_tokens":470,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-1501':11A,14A '-2026':10A,13A '1.0':25B,50C '3.0.0':27B,52C 'attack':34B 'certif':4A,32B,57C 'concert':2A,17B,23B,49C 'connect':7A 'could':40B 'cve':9A,12A 'host':20B 'ibm':1A,16B,22B,48C 'ibm-concert':15B 'imperson':42B 'improp':3A,56C 'intercept':46B 'network':38B 'path':39B 'posit':35B 'potenti':41B 'proper':30B 'secur':8A 'self':19B 'self-host':18B 'servic':44B 'traffic':47B 'valid':5A,31B,58C 'vendor':21B 'version':24B 'vulner':54C 'weaken':6A","nicknames":[],"mitigations":[],"who_affected":"IBM Concert deployments in the affected range 1.0 through 3.0.0 are potentially affected. The sources do not describe the specific data path or configuration that makes an installation exposed, so whether a given team is at risk is unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T18:17:06+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","cvss_by":"psirt@us.ibm.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-1501","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1501","severity":null,"published_at":"2026-10-19T18:17:06+00:00","modified_at":"2026-10-19T20:55:02+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"}