Medium severity · published Mar 31, 2026
CVE-2026-34218
ClearanceKit: Managed and user-defined policy rules not enforced between opfilter start and first policy modification
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to version 4.2.14, two related startup defects created a window during which only the single compile-time baseline rule was enforced by opfilter. All managed (MDM-delivered) and user-defined file-access rules were not applied until the user interacted with policies through the GUI, triggering a policy mutation over XPC. This issue has been patched in version 4.2.14.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
clearancekit · craigjbass
< 4.2.14 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34218
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34218
Patch
https://github.com/craigjbass/clearancekit/commit/56d617b778c571e3c29b803636d9807940992daa
Patch
https://github.com/craigjbass/clearancekit/commit/ddfdacb2633681bbd9c2f41dbd536ea039386628
Exploit
https://github.com/craigjbass/clearancekit/security/advisories/GHSA-fpmv-5wgw-qhhr
More from clearancekit
8.7
CVE-2026-33631
ClearanceKit: opfilter policy bypass via non-open file operations
7.8
CVE-2026-33632
ClearanceKit: opfilter policy bypass via exchangedata and clone operations
7.1
CVE-2026-40599
ClearanceKit: Ad-hoc signed binaries can spoof Apple process identities in the global allowlist
6.9
CVE-2026-47134
ClearanceKit: Policy signing key in System Keychain has permissive ACL allowing any local-root process to forge signed policy
6.9
CVE-2026-47133
ClearanceKit's signed policy tables lack monotonic counter, allowing replay of older legitimately-signed snapshots