CVE-2026-86819 in Waves Central
Summary
by MITRE • 09/09/2026
Waves Central for macOS contains a local privilege escalation in the privileged helper service. The helper authorizes connecting XPC clients by comparing the caller's code-signing certificate chain for equality with its own, rather than validating the caller against a pinned code requirement (application identifier and Team ID). A local, authenticated user can execute code within the vendor-signed process, satisfy the helper's client check, and cause the helper to execute a script with root privileges. Fixed in 17.0.
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Analysis
by VulDB Data Team • 09/09/2026
Waves Central for macOS contains a critical local privilege escalation vulnerability affecting its privileged helper service architecture. The core technical flaw stems from an insufficient validation mechanism used by the helper process to authorize incoming XPC (X Remote Procedure Call) clients. Instead of implementing robust code signing verification that checks specific application identifiers and Team IDs, the service relies on a simplistic comparison of the caller's entire code-signing certificate chain against its own. This approach is fundamentally flawed because it allows any executable signed by the same Certificate Authority to be treated as trusted, regardless of whether it belongs to the Waves Central application or an entirely different software package that shares the same signing identity.
The operational impact of this vulnerability is severe for local authenticated users on affected systems. An attacker with access to a user account can craft a malicious executable signed by the same certificate authority used by Waves Central. By leveraging this forged signature, the attacker can successfully authenticate as a valid client to the privileged helper service. Once authorized, the helper process executes commands or scripts provided by the attacker within its own context, which operates with root privileges. This effectively grants the unprivileged user full administrative control over the macOS system, bypassing standard security boundaries and allowing for complete system compromise, data exfiltration, persistence installation, and lateral movement preparation.
From a vulnerability classification perspective, this issue aligns closely with CWE-284 Improper Access Control, specifically regarding the failure to enforce proper authorization checks on privileged components. The flaw also reflects weaknesses in code signature validation often associated with CWE-345 Insufficient Verification of Data Authenticity when applied to binary integrity and identity verification. In terms of offensive security frameworks such as MITRE ATT&CK for macOS, this vulnerability facilitates privilege escalation techniques that allow attackers to move from a low-privilege user context to the root level by exploiting trusted system services. The reliance on certificate chain equality rather than specific entitlements or application identifiers represents a common anti-pattern in macOS development where developers assume shared signing authority implies trustworthiness without verifying functional intent.
Mitigation strategies must prioritize immediate software updates and architectural review. Users should upgrade Waves Central to version 17.0 or later, which addresses this validation logic by implementing proper pinned code requirements that check for the specific application identifier and Team ID rather than generic certificate chain equality. For organizations managing macOS endpoints, it is advisable to enforce strict application control policies using tools like Apple's Gatekeeper or third-party endpoint protection solutions that can detect unauthorized executions of privileged helper services. Additionally, developers should adopt secure coding practices that validate not just the signature but also the specific entitlements and bundle identifiers associated with any client attempting to communicate with a root-level service, ensuring that trust is granted only to explicitly authorized applications rather than broadly signed entities.