ClearanceKit: opfilter policy bypass via non-open file operations_CVE-2026-33631

8.7 / 10

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Description

ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. In versions on the 4.1 branch and earlier, the opfilter Endpoint Security system extension enforced file access policy exclusively by intercepting ES_EVENT_TYPE_AUTH_OPEN events. Seven additional file operation event types were not intercepted, allowing any locally running process to bypass the configured FAA policy without triggering a denial. Commit a3d1733 adds subscriptions for all seven event types and routes them through the existing FAA policy evaluator. AUTH_RENAME and AUTH_UNLINK additionally preserve XProtect change detection: events on the XProtect path are allowed and trigger the existing onXProtectChanged callback rather than being evaluated against user policy. All versions on the 4.2 branch contain the fix. No known workarounds are available.

Basic Information

ID CVE-2026-33631

Source GitHub_M

Published Mar 26, 2026 at 19:30

Modified Mar 30, 2026 at 14:55

Affected Product

Vendor craigjbass

Product clearancekit

Version < 4.2

Affected Versions craigjbass clearancekit < 4.2

CWE Classification

CWE-862

References

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    "published": "2026-03-26T19:30:30.379Z",
    "modified": "2026-03-30T14:55:32.151Z",
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