CVE-2026-40604
ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement
- State
- Published
- Severity
- 8.2 High
- Published
- Apr 21, 2026
- Updated
- Apr 21, 2026
- Reserved
- Apr 14, 2026
Description
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6, the opfilter Endpoint Security system extension (bundle ID uk.craigbass.clearancekit.opfilter) can be suspended with SIGSTOP or kill -STOP, or killed with SIGKILL/SIGTERM, by any process running as root. While the extension is suspended, all AUTH Endpoint Security events time out and default to allow, silently disabling ClearanceKit's file-access policy enforcement for the duration of the suspension. This vulnerability is fixed in 5.0.6.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:H/SI:H/SA:N | GitHub_M |
Weaknesses
- CWE-693 Protection Mechanism Failure
Affected Products
| Product | Versions |
|---|---|
clearancekitcraigjbass |
|
References
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