PatchTheCVECVE-2026-12374: Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the PrivilegedHelpe
CVE-2026-12374 is a medium-severity flaw (CVSS 6.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the PrivilegedHelperTool XPC service in Cato Client before v.5.13.1 on macOS allows a local authenticated attacker to escalate privileges to root via a self-signed certificate that bypasses the XPC caller verification and a symlink swap during package installation.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
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-2026-12374?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-12374 being exploited?
CVE-2026-12374 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-2026-12374 affect?
CVE-2026-12374 affects affected software. Severity is medium (CVSS 6.4). Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the PrivilegedHelperTool XPC service in Cato Client before v.5.13.1 on macOS allows a local authenticated attacker to escalate privileges to root via
How urgent is CVE-2026-12374?
Priority 22/100. No elevated risk signals yet.