CVE-2026-40604 PUBLISHED

ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement

Assigner: GitHub_M
Reserved: 14.04.2026 Published: 21.04.2026 Updated: 21.04.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 8.2

Product Status

Vendor craigjbass
Product clearancekit
Versions
  • Version < 5.0.6 is affected

References

Problem Types

  • CWE-693: Protection Mechanism Failure CWE