HOMEVULNERABILITIESCVE-2026-40599
HIGH

CVE-2026-40599

CWE-863Published: April 21, 2026· Updated: Apr 24, 2026

7.1
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.2th

Official 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.

NVD Source

Technical Analysis

CVE-2026-40599 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 7.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

Apple1 product
macos
craigjbass1 product
clearancekit
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/craigjbass/clearancekit/security/advisories/GHSA-w253-42qp-5f2x
ADVISORYhttps://github.com/craigjbass/clearancekit/security/advisories/GHSA-w253-42qp-5f2x

All References (2)

→
https://github.com/craigjbass/clearancekit/security/advisories/GHSA-w253-42qp-5f2xExploit · Vendor Advisory
→
https://github.com/craigjbass/clearancekit/security/advisories/GHSA-w253-42qp-5f2xExploit · Vendor Advisory

Quick Facts

CVE IDCVE-2026-40599
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-863
CISA KEVNo
EPSS (30d)0.01%
Affected2 vendors
PublishedApr 21, 2026

Related CVEs (CWE-863)

CVE-2026-44330
10.0
CVE-2026-48286
10.0
CVE-2026-48303
10.0
CVE-2026-41050
9.9
CVE-2026-28466
9.9
CVE-2026-43948
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-40599 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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