CVE-2026-33631: ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies

Q: How do I fix CVE-2026-33631?

clearancekit: upgrade to 4.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-33631 being exploited?

CVE-2026-33631 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33631 affect?

CVE-2026-33631 affects clearancekit. Severity is high (CVSS 8.7). ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. In versions on the 4.1 branch and earlier, the opfilter Endpoint Security system extension enforced file access policy exclusively by inter

Routine

HIGH 8.7UPGRADE

CVE-2026-33631 is a high-severity flaw (CVSS 8.7) affecting clearancekit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. In versions on the 4.1 branch and earlier, the opfilter Endpoint Security system extension enforced file access policy exclusively by intercepting ES_EVENT_TYPE_AUTH_OPEN events. Seven additional file operation event types were not intercepted, allowing any locally running process to bypass the configured FAA policy without triggering a denial. Co

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: craigjbass

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 20:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

craigjbass clearancekit UPGRADE

Affected: < 4.2

Fixed in: 4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy clearancekit || rpm -q clearancekit || clearancekit --version

2. UPGRADE to 4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade clearancekit

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade clearancekit

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33631?

clearancekit: upgrade to 4.2. Exact commands for each OS are on this page.

Is CVE-2026-33631 being exploited?

CVE-2026-33631 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33631 affect?

CVE-2026-33631 affects clearancekit. Severity is high (CVSS 8.7). ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies. In versions on the 4.1 branch and earlier, the opfilter Endpoint Security system extension enforced file access policy exclusively by inter

How urgent is CVE-2026-33631?

Priority 31/100. High severity

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-40599 HIGH 7.1 UPGRADE ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies
CVE-2026-40604 MEDIUM 4.4 UPGRADE ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies
CVE-2026-33632 HIGH 7.8 UPGRADE ClearanceKit intercepts file-system access events on macOS and enforces per-process access policies

References

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