CVE-2026-67399
Deserialization of untrusted data in WHMCS 9.0.0 before 9.0.8 and 8.0.0 before 8.13.7 allows remote attackers to execute arbitrary code.
- Published Sep 14, 2026
- CVSS 9.3 critical
- 0.8% chance of exploitation in the next 30 days (EPSS)
- A fix is available