CVE-2026-40191: medium-severity vulnerability in craigjbass clearancekit
ClearanceKit has a policy bypass via dual-path Endpoint Security events checking only source path
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.1%
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.4-beta-1f46165, ClearanceKit's Endpoint Security event handler only checked the source path of dual-path file operations against File Access Authorization (FAA) rules and App Jail policies. The destination path was ignored entirely. This allowed any local process to bypass file-access protection by using rename, link, copyfile, exchangedata, or clone operations to place or replace files inside protected directories. This vulnerability is fixed in 5.0.4-beta-1f46165.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
craigjbass · clearancekitRelated CVEs — craigjbass clearancekit
In the same product, most dangerous first.
CVE-2026-34218MEDIUMClearanceKit: Managed and user-defined policy rules not enforced between opfilter start and first policy modificationEPSS 0.2%CVE-2026-47134MEDIUMClearanceKit: Policy signing key in System Keychain has permissive ACL allowing any local-root process to forge signed policyEPSS 0.2%CVE-2026-47133MEDIUMClearanceKit's signed policy tables lack monotonic counter, allowing replay of older legitimately-signed snapshotsEPSS 0.2%CVE-2026-40599HIGHClearanceKit: Ad-hoc signed binaries can spoof Apple process identities in the global allowlistEPSS 0.1%CVE-2026-40604HIGHClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcementEPSS 0.1%CVE-2026-33632HIGHClearanceKit: opfilter policy bypass via exchangedata and clone operationsEPSS 0.1%