CVE-2026-67394

A critical local privilege escalation via OS command injection vulnerability has been discovered in Plesk for Linux, affecting all versions from 18.0.34 before 18.0.79.9 and 18.0.80.5. The vulnerability allows a customer or reseller with shell access (or allowed to change their own shell access) to elevate privileges to the root account on the hosting server.

  • Published Sep 1, 2026
  • CVSS 9.0 critical
  • 1.3% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-67394 at the National Vulnerability Database