How severe is CVE-2026-40599?

CVE-2026-40599 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-40599 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40599?

CVE-2026-40599 affects Craigjbass Clearancekit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40599?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40599 have an EU (EUVD) identifier?

Yes. CVE-2026-40599 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24209.

When was CVE-2026-40599 published?

CVE-2026-40599 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-40599

CVE-2026-40599 is a high-severity vulnerability in Craigjbass Clearancekit with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 8.4
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24209
Weakness: CWE-863
Affected product: Craigjbass Clearancekit
Published: 2026-04-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40599?: 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.
How severe is CVE-2026-40599?: CVE-2026-40599 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-40599 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40599?: CVE-2026-40599 affects Craigjbass Clearancekit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40599?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40599 have an EU (EUVD) identifier?: Yes. CVE-2026-40599 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24209.
When was CVE-2026-40599 published?: CVE-2026-40599 was published on 2026-04-21 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:craigjbass:clearancekit:*:*:*:*:*:*:*:*

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