CVE-2026-40599

ClearanceKit: Ad-hoc signed binaries can spoof Apple process identities in the global allowlist

HIGH
7.1
CVSS Score
Published: April 21, 2026 at 05:37 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
1 product affected across 1 vendorClearancekit· also runs on 1 platform

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Severity
HIGH7.1
Exploit prediction
EPSS 0.1%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.0.5
Affected range stops below 5.0.5, so it looks safe — our inference, not a vendor statement
apple-macos (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

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

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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