CVE-2026-40604— ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement
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I. Basic Information for CVE-2026-40604
Vulnerability Information
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Vulnerability Title
ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
保护机制失效
Source: NVD (National Vulnerability Database)
Vulnerability Title
ClearanceKit 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ClearanceKit是Craig J. Bass个人开发者的一个macOS文件系统访问控制工具。 ClearanceKit 5.0.6之前版本存在安全漏洞，该漏洞源于opfilter Endpoint Security系统扩展可被root进程暂停或终止，可能导致文件访问策略在暂停期间被静默禁用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| craigjbass | clearancekit | < 5.0.6 | - |
II. Public POCs for CVE-2026-40604
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: clearancekit
- CVE-2026-40599
ClearanceKit: Ad-hoc signed binaries can spoof Apple process - CVE-2026-40191
ClearanceKit has a policy bypass via dual-path Endpoint Secu - CVE-2026-34218
ClearanceKit: Managed and user-defined policy rules not enfo - CVE-2026-33632
ClearanceKit: opfilter policy bypass via exchangedata and cl - CVE-2026-33631
ClearanceKit: opfilter policy bypass via non-open file opera
Same vendor: craigjbass
- CVE-2026-40599
ClearanceKit: Ad-hoc signed binaries can spoof Apple process - CVE-2026-40191
ClearanceKit has a policy bypass via dual-path Endpoint Secu - CVE-2026-34218
ClearanceKit: Managed and user-defined policy rules not enfo - CVE-2026-33632
ClearanceKit: opfilter policy bypass via exchangedata and cl - CVE-2026-33631
ClearanceKit: opfilter policy bypass via non-open file opera
Same weakness: CWE-693
V. Comments for CVE-2026-40604
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