CVE-2026-67399

CRITICAL 9.3CVE-2026-67399 · Published 14/09/2026 · updated 18/09/2026

In short

CVE-2026-67399 is a CRITICAL (CVSS 9.3) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.75%, higher than 55.0% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

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.

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