---
id: "CVE-2026-1501"
kind: "vulnerability"
aliases: ["CVE-2026-1501"]
title: "IBM Concert: improper certificate validation weakens connection security"
severity: "low"
cvss: 3.7
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["ibm-concert", "self-hosted", "vendor"]
not_affected_if: []
published_at: "2026-10-19T18:17:06+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:44:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1501", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# IBM Concert: improper certificate validation weakens connection security

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.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed IBM Concert version against the affected range 1.0 through 3.0.0
- unknown

## Fix

- Move IBM Concert to a version newer than `3.0.0` once IBM publishes a fixed release
- unknown

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-1501

## From the sources

IBM Concert 1.0 through 3.0.0 is vulnerable to Improper Certificate Validation.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_