# CVE-2026-40604: ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6…

Source: https://junglewise.ai/threats/cve-2026-40604-clearancekit-intercepts-file-system-access-events-on-macos-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-21  
License: CC BY 4.0 with a link back

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.

Technologies: [Apple macOS](https://junglewise.ai/threats/technologies/macos), [Craigjbass ClearanceKit](https://junglewise.ai/threats/technologies/clearancekit). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple), [Craigjbass](https://junglewise.ai/threats/vendors/craigjbass).

## Quick answers

**Is CVE-2026-40604 exploited in the wild?** 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.

## Affected products

- Apple macOS
- Craigjbass ClearanceKit

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