CVE-2026-12374

unknowncovered by 1 sourcefirst seen 2026-07-01

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.

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Exploitation outlook

Low exploitation risk0.06% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 0% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-12374: Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the…nvd · 2026-07-01

External references

NVD record for CVE-2026-12374

CVE.org record

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