CVE-2026-34218
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
ClearanceKit has a startup defect where only compile-time rules are enforced until user interacts with GUI. MDM and user-defined rules are not applied.
Risk Assessment
During the startup window, file access rules are not fully enforced, potentially allowing unauthorized processes to access protected files.
Recommendation
Update ClearanceKit to version 4.2.14 or later.
Other vulnerabilities in ClearanceKit
See all- CVE-2026-47134Medium
In ClearanceKit before version 5.0.10, the ECDSA key used to sign the policy database is stored in the macOS keychain without ACL restrictions. Any root process can use this key to sign arbitrary policy content.
- CVE-2026-47133Medium
In ClearanceKit before version 5.0.10, ECDSA signatures for SQLite database tables lack a version counter or freshness binding. An attacker can replace the database and signatures with an older, legitimately signed version, which will be accepted by the system.
- CVE-2026-40604Medium
In ClearanceKit before 5.0.6, the opfilter system extension can be suspended with SIGSTOP or killed with SIGKILL/SIGTERM by any process running as root. While suspended, AUTH Endpoint Security events time out and default to allow, silently disabling file-access policy enforcement.
- CVE-2026-40191Medium
ClearanceKit versions prior to 5.0.4-beta-1f46165 have a flaw in the Endpoint Security event handler where only the source path of dual-path file operations is checked, and the destination path is ignored. This allows any local process to bypass file-access protection using rename, link, copyfile, exchangedata, or clone operations.
Original NVD description (English source)
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to version 4.2.14, two related startup defects created a window during which only the single compile-time baseline rule was enforced by opfilter. All managed (MDM-delivered) and user-defined file-access rules were not applied until the user interacted with policies through the GUI, triggering a policy mutation over XPC. This issue has been patched in version 4.2.14.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS