High severity · published Apr 21, 2026
CVE-2026-40599
ClearanceKit: Ad-hoc signed binaries can spoof Apple process identities in the global allowlist
7.1
CVSS
0.1%
EPSS
No
On KEV
Description
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.5, ClearanceKit incorrectly treats a process with an empty Team ID and a non-empty Signing ID as an Apple platform binary. This bug allows a malicious software to impersonate an apple process in the global allowlist, and access all protected files. This vulnerability is fixed in 5.0.5.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
clearancekit · craigjbass
< 5.0.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40599
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40599
Exploit
https://github.com/craigjbass/clearancekit/security/advisories/GHSA-w253-42qp-5f2x
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6.8
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