{"id":"CVE-2026-40604","aliases":["EUVD-2026-24213","GHSA-5r9w-9fg6-266q"],"status":"published","title":"ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement","description":"ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6, the opfilter Endpoint Security system extension (bundle ID uk.craigbass.clearancekit.opfilter) can be suspended with SIGSTOP or kill -STOP, or killed with SIGKILL/SIGTERM, by any process running as root. While the extension is suspended, all AUTH Endpoint Security events time out and default to allow, silently disabling ClearanceKit's file-access policy enforcement for the duration of the suspension. This vulnerability is fixed in 5.0.6.","severity":{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:H/SI:H/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00105,"percentile":0.01071,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-693"],"published":"2026-04-21T17:41:53Z","modified":"2026-10-28T02:30:43Z","products":[{"vendor":"craigjbass","product":"clearancekit"}],"references":[{"url":"https://github.com/craigjbass/clearancekit/security/advisories/GHSA-5r9w-9fg6-266q","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40604.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40604","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-40604","title":"ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement","description":"ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6, the opfilter Endpoint Security system extension (bundle ID uk.craigbass.clearancekit.opfilter) can be suspended with SIGSTOP or kill -STOP, or killed with SIGKILL/SIGTERM, by any process running as root. While the extension is suspended, all AUTH Endpoint Security events time out and default to allow, silently disabling ClearanceKit's file-access policy enforcement for the duration of the suspension. This vulnerability is fixed in 5.0.6.","status":"published","published":"2026-04-21T17:41:53.58Z","modified":"2026-04-21T20:36:53.181Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:H/SI:H/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T13:43:22.599321Z"}],"euvd":[{"id":"EUVD-2026-24213","description":"ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6, the opfilter Endpoint Security system extension (bundle ID uk.craigbass.clearancekit.opfilter) can be suspended with SIGSTOP or kill -STOP, or killed with SIGKILL/SIGTERM, by any process running as root. While the extension is suspended, all AUTH Endpoint Security events time out and default to allow, silently disabling ClearanceKit's file-access policy enforcement for the duration of the suspension. This vulnerability is fixed in 5.0.6.","status":"published","published":"2026-04-21T17:41:53Z","modified":"2026-04-21T20:36:53Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:H/SI:H/SA:N","level":"high"}],"updated_at":"2026-11-02T19:24:21.101387Z"}],"nvd":[{"id":"CVE-2026-40604","description":"ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6, the opfilter Endpoint Security system extension (bundle ID uk.craigbass.clearancekit.opfilter) can be suspended with SIGSTOP or kill -STOP, or killed with SIGKILL/SIGTERM, by any process running as root. While the extension is suspended, all AUTH Endpoint Security events time out and default to allow, silently disabling ClearanceKit's file-access policy enforcement for the duration of the suspension. This vulnerability is fixed in 5.0.6.","status":"published","published":"2026-04-21T18:16:51.977Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T14:12:15.493943Z"}],"osv":[{"id":"CVE-2026-40604","title":"ClearanceKit: opfilter system extension can be suspended or signalled by a root process, disabling file-access policy enforcement","description":"ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to 5.0.6, the opfilter Endpoint Security system extension (bundle ID uk.craigbass.clearancekit.opfilter) can be suspended with SIGSTOP or kill -STOP, or killed with SIGKILL/SIGTERM, by any process running as root. While the extension is suspended, all AUTH Endpoint Security events time out and default to allow, silently disabling ClearanceKit's file-access policy enforcement for the duration of the suspension. This vulnerability is fixed in 5.0.6.","status":"published","published":"2026-04-21T17:41:53.58Z","modified":"2026-10-28T02:30:43.083379418Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:H/SI:H/SA:N","level":"high"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T15:45:03.424067Z"}]}}