Vulnerability · Published Jul 20, 2026 · Assigned by GitHub_M
CVE-2026-47133ClearanceKit's signed policy tables lack monotonic counter, allowing replay of older legitimately-signed snapshots
Medium 6.9
In plain English
A medium-severity security flaw 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 4% of all known vulnerabilities).
Official description
ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. Prior to version 5.0.10, each table in the on-disk SQLite policy store (`/Library/Application Support/clearancekit/store.db`) is verified using an ECDSA signature stored in the `data_signatures` table. The signed payload contains only the canonical row content, with no version counter or freshness binding. An attacker who can write `store.db` and the matching `data_signatures` row — feasible during the opfilter-update window when the Endpoint Security filter is offline, or via offline-boot / decrypted-backup scenarios — can substitute a previously-captured legitimately-signed snapshot. opfilter accepts the older snapshot as fully valid on next boot because the existing signatures still verify. Version 5.0.10 patches the issue.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| craigjbass | clearancekit | < 5.0.10 |
Weakness: CWE-294 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N