# CVE-2026-40604

> Vulnerability · severity: **MEDIUM** (CVSS 4.4).

## 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.

## Key facts

- **CVE ID:** CVE-2026-40604
- **Published:** 2026-04-21
- **CVSS severity:** MEDIUM
- **CVSS base score:** 4.4
- **CWE codes:** CWE-693

## Affected products

- `craigjbass:clearancekit`
- `apple:macos`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40604

## Citation

> AI Analytics. CVE-2026-40604. Retrieved 2026-07-09 from https://api.ai-analytics.org/cve/CVE-2026-40604. Derived from NIST NVD. Licensed CC0.

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