TI-2026-29340 Aliases CVE-2026-40604

Protection mechanism failure in craigjbass clearancekit

LOW 34CWE-693Published 2026-04-21 · Updated 2026-04-21

Key facts

Attack vector: Local
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-693.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00105 1st percentileScored 2026-11-07

Fix Fixed clearancekit (craigjbass): 5.0.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
craigjbass	clearancekit	before 5.0.6	5.0.6	Patch available	CNA

clearancekit Vendorcraigjbass Affected before 5.0.6 Fixed in 5.0.6 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:craigjbass:clearancekit::::::::	before 5.0.6	Vulnerable	craigjbass
cpe:2.3:o:apple:macos:-:::::::*	not specified by NVD	Running on	Apple

cpe:2.3:a:craigjbass:clearancekit:*:*:*:*:*:*:*:* Versions before 5.0.6 Vulnerable ·craigjbass
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple

Remediation

Fix · CNA clearancekit (craigjbass) Fixed in 5.0.6

Timeline

2026-10-02 Threatist record created from CVE-2026-40604

References

Advisory 1

https://github.com/craigjbass/clearancekit/security/advisories/GHSA-5r9w-9fg6-266q

TI-2026-29335 ClearanceKit: Ad-hoc signed binaries can spoof Apple process identities in the global allowlist CVSS 4.0HIGH 8.4
TI-2026-26012 ClearanceKit: opfilter policy bypass via non-open file operations CVSS 3.1HIGH 8.7
TI-2026-26013 ClearanceKit: opfilter policy bypass via exchangedata and clone operations CVSS 4.0HIGH 8.4
TI-2026-26513 ClearanceKit: Managed and user-defined policy rules not enforced between opfilter start and first policy modification CVSS 4.0MEDIUM 6.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences