CVE-2026-47133 ClearanceKit's signed policy tables lack monotonic counter, allowing replay of older legitimately-signed snapshots
Attackers can bypass file access controls by replaying old signed policy snapshots, requiring local write access to the database.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47133?
CVE-2026-47133 is a medium-severity vulnerability in craigjbass clearancekit, published on 20 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Weakness: CWE-294
Which versions are affected by CVE-2026-47133?
How do I fix CVE-2026-47133?
No fix has been published for CVE-2026-47133 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-47133 being exploited?
There is no known exploitation of CVE-2026-47133 in the wild and no public exploit code.
Sources
Also known as GHSA-9hx3-5wp9-2qqg.