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CVE-2026-40191— ClearanceKit has a policy bypass via dual-path Endpoint Security events checking only source path

Quick assessment

Affected
craigjbass clearancekit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 5.0.4-beta-1f46165之前版本存在安全漏洞，该漏洞源于端点安全事件处理程序仅检查双路径文件操作的源路径，而完全忽略目标路径，可能导致任何本地进程通过重命名、链接、复制文件等操作绕过文件访问保护。

AI Predicted 8.6 Difficulty: Easy EPSS 0.11% · P2

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes
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I. Basic Information for CVE-2026-40191

Vulnerability Information
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Vulnerability Title
ClearanceKit has a policy bypass via dual-path Endpoint Security events checking only source path
Source: CVE Program / CVE List V5
Vulnerability Description
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.4-beta-1f46165, ClearanceKit's Endpoint Security event handler only checked the source path of dual-path file operations against File Access Authorization (FAA) rules and App Jail policies. The destination path was ignored entirely. This allowed any local process to bypass file-access protection by using rename, link, copyfile, exchangedata, or clone operations to place or replace files inside protected directories. This vulnerability is fixed in 5.0.4-beta-1f46165.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
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 5.0.4-beta-1f46165之前版本存在安全漏洞，该漏洞源于端点安全事件处理程序仅检查双路径文件操作的源路径，而完全忽略目标路径，可能导致任何本地进程通过重命名、链接、复制文件等操作绕过文件访问保护。
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 < 5.0.4-beta-1f46165 -

II. Public POCs for CVE-2026-40191

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III. Intelligence Information for CVE-2026-40191

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Patches & Fixes for CVE-2026-40191 (1)

Vendor Advisories for CVE-2026-40191 (1)

IV. Related Vulnerabilities

Same product: clearancekit
Same vendor: craigjbass
Same weakness: CWE-863