{"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","slug":"CVE-2026-3303","body":"## Overview\n\nIBM 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.\n\n## Affected\n\n- `Concert >= 1.0.0 <= 3.0.0`\n\n## Remediation\n\nIBM strongly recommends addressing these vulnerabilities now by upgrading to IBM Concert Software 3.0.1.1\nDownload 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.","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}