CVE-2026-40604: ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6…
CVE-2026-40604 · Severity: medium · CVSS 4.4 · Published 2026-04-21
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-40604 being exploited in the wild.
How severe is CVE-2026-40604?
Medium severity, with a CVSS score of 4.4, published 21 April 2026.
Which products and versions are affected?
Apple macOS, Craigjbass ClearanceKit. The advisory does not name versions.
Is there a fix for CVE-2026-40604?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-40604?
Check whether you run Apple macOS or Craigjbass ClearanceKit. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.