Vulnerabilities in MWDB Core software

CERT Polska during own research has found vulnerabilities in MWDB Core software and coordinated their disclosure.

The vulnerabilityCVE-2026-66723: MWDB Core versions >=2.2.0 and <2.19.0 contain a missing authorization vulnerability in the Remote Instances proxy API. The proxy API does not verify authentication for incoming requests, allowing an unauthenticated remote attacker to send arbitrary requests to a remote MWDB instance using the identity and permissions associated with the configured API key. This can result in unauthorized actions being performed on the remote instance as if executed by the user whose API key was used to set up the remote instance. The vulnerability is limited to deployments where Remote Instances have been configured.

The vulnerabilityCVE-2026-66724: MWDB Core versions >=2.0.0 and <2.19.0 contain a missing authorization vulnerability in the deprecated config and blob upload endpoints. These endpoints accept the undocumented POST method, which bypasses the capability checks applied to the documented PUT method. This allows any authenticated user without theadding_configsoradding_blobscapabilities to upload config and text blob objects to the system. The impact is limited to adding new config and blob objects.

These issues have been fixed in version 2.19.0.