IBM Concert 1.0-3.0.0 CORS Misconfiguration Enables Privileged Actions
CVE-2026-3303 Published on October 19, 2026
IBM Concert Software Permissive Cross-domain Security Policy
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.
Vulnerability Analysis
CVE-2026-3303 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
Permissive Cross-domain Policy with Untrusted Domains
The software uses a cross-domain policy file that includes domains that should not be trusted.
Products Associated with CVE-2026-3303
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Affected Versions
IBM Concert:- Version 1.0.0, <= 3.0.0 is affected.