What is GHSA-fmmf-42mh-hr4x?

GHSA-fmmf-42mh-hr4x is a security advisory published by GitHub Security Advisories with Medium severity. Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the...

Which CVE IDs does GHSA-fmmf-42mh-hr4x cover?

GHSA-fmmf-42mh-hr4x covers the following CVE IDs: CVE-2026-12374. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

GHSA-fmmf-42mh-hr4xMedium

Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the...

Vendor

GitHub Security Advisories

Published

July 1, 2026

Last Modified

July 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-12374 →

📋 Description

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.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-12374
https://support.catonetworks.com/hc/en-us/articles/37284626576413-Security-Vulnerability-CVE-2026-12374-that-Impacts-macOS-Client-Versions-Lower-than-5-13-1
https://github.com/advisories/GHSA-fmmf-42mh-hr4x