CVE-2026-17472 Overview
CVE-2026-17472 is a privilege escalation vulnerability in IBM Concert versions 1.0.0 through 3.0.0. The flaw stems from the use of wildcards in role-based access control (RBAC) permission definitions. A remote authenticated attacker can leverage overly broad permissions to access or modify resources outside their authorization scope. The weakness is categorized under [CWE-269] Improper Privilege Management. IBM has published guidance through the IBM Support Page.
Critical Impact
An authenticated user with limited privileges can reach resources belonging to other tenants or roles, breaking the security boundary IBM Concert enforces between workloads.
Affected Products
- IBM Concert 1.0.0
- IBM Concert 2.x
- IBM Concert 3.0.0
Discovery Timeline
- 2026-09-22 - CVE-2026-17472 published to NVD
- 2026-09-24 - Last updated in NVD database
Technical Details for CVE-2026-17472
Vulnerability Analysis
IBM Concert relies on RBAC to gate access to managed resources and API endpoints. The vulnerable versions define permissions using wildcard patterns that match more resources than intended. When the authorization engine evaluates a request, wildcards collapse distinct resource scopes into a single permissive grant. An authenticated user with a low-privilege role therefore inherits access to resources meant for higher-privilege roles or other tenants. The scope change (S:C in the CVSS vector) reflects that the impact crosses trust boundaries beyond the vulnerable component. Confidentiality and integrity of managed data are both affected, while availability is not directly impacted.
Root Cause
The root cause is improper privilege management [CWE-269] in RBAC policy authoring. Wildcard tokens in permission definitions match resource identifiers, actions, or namespaces beyond the intended scope. The authorization layer does not apply additional context checks such as tenant ownership or resource-type filtering before granting access.
Attack Vector
Exploitation requires network access to the IBM Concert API and valid authenticated credentials at any privilege level. The attacker issues API requests targeting resource identifiers they do not own. Because the RBAC evaluator matches the request against a wildcard grant, the requests succeed. No user interaction is required, and attack complexity is low. See the IBM Support Page for vendor-authored technical details.
Detection Methods for CVE-2026-17472
Indicators of Compromise
- API requests from low-privilege service accounts targeting resources owned by other tenants or administrative roles.
- Unexpected read or write operations against Concert-managed configuration, policies, or inventory data.
- Access log entries where the requesting principal and the resource owner belong to different organizational units.
Detection Strategies
- Audit RBAC policy documents for wildcard characters in resource, action, or namespace fields, and correlate matches against actual usage.
- Baseline API call patterns per user role, then alert on deviations that indicate cross-tenant or cross-role access.
- Enable verbose authorization logging in IBM Concert and forward events to a SIEM for correlation.
Monitoring Recommendations
- Ingest IBM Concert audit logs into a centralized data lake and normalize fields such as principal, role, action, and resource identifier.
- Build alerts for authorization decisions that resolve through wildcard-based policy rules.
- Track privileged operations performed by non-privileged accounts and route them to the security operations team for review.
How to Mitigate CVE-2026-17472
Immediate Actions Required
- Apply the fixed version referenced in the IBM Support Page as soon as it is available in the maintenance channel.
- Review all custom RBAC roles and remove wildcards where explicit resource or action names can be used instead.
- Rotate credentials for any account whose access logs suggest it may have exercised the vulnerable authorization path.
Patch Information
IBM has published remediation guidance on the IBM Support Page for CVE-2026-17472. Administrators should follow IBM's version guidance to upgrade IBM Concert deployments beyond the 1.0.0 through 3.0.0 range identified in the advisory.
Workarounds
- Restrict Concert API network exposure to trusted management networks and require strong authentication for all callers.
- Replace wildcard RBAC bindings with explicit least-privilege permissions scoped to specific resources or namespaces.
- Temporarily reduce the number of accounts with any Concert role until the patched version is deployed and policies are audited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.