---
id: CVE-2026-3303
title: IBM Concert Software Permissive Cross-domain Security Policy
summary: >-
  IBM Concert 1.0 through 3.0.0 uses cross-origin resource sharing (CORS) which
  could allow an attacker to carry out privileged actions as the domain name is
  not being limited to only trusted domains.
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-942
vendor: IBM
product: Concert
affected:
  - Concert >= 1.0.0 <= 3.0.0
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T17:17:45.343Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-3303'
references:
  - url: 'https://www.ibm.com/support/pages/node/7292374'
tags:
  - cve.org
ingestedAt: '2026-10-19T17:33:42.446Z'
---

## Overview

IBM Concert 1.0 through 3.0.0 uses cross-origin resource sharing (CORS) which could allow an attacker to carry out privileged actions as the domain name is not being limited to only trusted domains.

## Affected

- `Concert >= 1.0.0 <= 3.0.0`

## Remediation

IBM strongly recommends addressing these vulnerabilities now by upgrading to IBM Concert Software 3.0.1.1
Download IBM Concert Software 3.0.1.1 from Container software library section of IBM Entitled Registry (ICR) and follow installation instructions depending on the type of deployment.