Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M

CVE-2026-34218ClearanceKit: Managed and user-defined policy rules not enforced between opfilter start and first policy modification

Medium 5.5

In plain English

A medium-severity privilege mismanagement in clearancekit from craigjbass. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.2%top 89.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
craigjbass	clearancekit	< 4.2.14

Weakness: CWE-269 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/craigjbass/clearancekit/security/advisories/GHSA-fpmv-5wgw-qhhr x_refsource_CONFIRM
https://github.com/craigjbass/clearancekit/commit/56d617b778c571e3c29b803636d9807940992daa x_refsource_MISC
https://github.com/craigjbass/clearancekit/commit/ddfdacb2633681bbd9c2f41dbd536ea039386628 x_refsource_MISC