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CVE-2026-34218— ClearanceKit: Managed and user-defined policy rules not enforced between opfilter start and first policy modification

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 4.2.14之前版本存在安全漏洞，该漏洞源于启动缺陷导致访问策略未完全加载，可能导致访问控制不当。

AI Predicted 5.5 Difficulty: Easy EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1562.008
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I. Basic Information for CVE-2026-34218

Vulnerability Information
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Vulnerability Title
ClearanceKit: Managed and user-defined policy rules not enforced between opfilter start and first policy modification
Source: CVE Program / CVE List V5
Vulnerability Description
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to version 4.2.14, two related startup defects created a window during which only the single compile-time baseline rule was enforced by opfilter. All managed (MDM-delivered) and user-defined file-access rules were not applied until the user interacted with policies through the GUI, triggering a policy mutation over XPC. This issue has been patched in version 4.2.14.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
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 4.2.14之前版本存在安全漏洞，该漏洞源于启动缺陷导致访问策略未完全加载，可能导致访问控制不当。
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 < 4.2.14 -

II. Public POCs for CVE-2026-34218

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III. Intelligence Information for CVE-2026-34218

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Vendor Advisories for CVE-2026-34218 (1)

IV. Related Vulnerabilities

Same product: clearancekit
Same vendor: craigjbass
Same weakness: CWE-269