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Plesk CVE-2026-67394: OS Command Injection

Plesk is affected by 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. Affected versions: 18.0.34 before 18.0.79.9 | 18.0.80 before 18.0.80.5. CVSS base score: 9.

Critical 9 CVSS
Plesk AlmaLinux 8 AlmaLinux 9 CloudLinux 8 CloudLinux 9 Debian 11 Debian 12 Ubuntu 20.04 Ubuntu 22.04

Betroffene Versionen

18.0.34 before 18.0.79.9 | 18.0.80 before 18.0.80.5

Standard-Update-Befehl

plesk installer --select-release-current --reinstall-patch

Fix-Befehle

AlmaLinux / Ubuntu / Debian / CloudLinux / Rocky Linux

plesk installer --select-release-current --reinstall-patch
plesk version

Was das unter einer SharedLicense-Lizenz bedeutet

Your SharedLicense Plesk license itself is not affected — this is a vulnerability in Plesk, not in licensing. Licenses continue to work during and after the update; there is no need to re-issue or re-activate anything. If you resell under your own brand, patch client servers too — unpatched installs put your reputation at risk, not your license.

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.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-67394

Häufig gestellte Fragen

What is 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. Affected versions: 18.0.34 before 18.0.79.9 | 18.0.80 before 18.0.80.5.
Is CVE-2026-67394 being exploited in the wild?
No confirmed public exploitation has been announced at the time of writing. With a CVSS base score of 9, apply the update on your next maintenance window and watch the vendor advisory for changes.
How do I fix CVE-2026-67394?
plesk installer --select-release-current --reinstall-patch. plesk version.
Which versions are affected?
Affected: 18.0.34 before 18.0.79.9 | 18.0.80 before 18.0.80.5. Update to the latest release.

Referenzen

Sicherheitshinweise

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