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Plesk CVE-2026-87898: OS Command Injection

Plesk is affected by CVE-2026-87898. OS command injection in Plesk allows remote authenticated users to execute arbitrary code with root privileges. Affected versions: 1.6.6 – 1.12.1. Fixed in 1.12.2. CVSS base score: 9.4.

Critical 9.4 CVSS
Plesk AlmaLinux 8 AlmaLinux 9 CloudLinux 8 CloudLinux 9 Debian 11 Debian 12 Ubuntu 20.04 Ubuntu 22.04

Affected Versions

1.6.6 – 1.12.1

Patched Version

1.12.2

Default Update CMD

# Update the Site Import extension to 1.12.2 or later

Fix Commands

All supported operating systems

# Update the Site Import extension to 1.12.2 or later
# Plesk → Extensions → Updates → Site Import → Update

What this means under a SharedLicense license

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.

OS command injection in Plesk allows remote authenticated users to execute arbitrary code with root privileges.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-87898

Frequently Asked Questions

What is CVE-2026-87898?
OS command injection in Plesk allows remote authenticated users to execute arbitrary code with root privileges. Affected versions: 1.6.6 – 1.12.1. Fixed in 1.12.2.
Is CVE-2026-87898 being exploited in the wild?
No confirmed public exploitation has been announced at the time of writing. With a CVSS base score of 9.4, apply the update on your next maintenance window and watch the vendor advisory for changes.
How do I fix CVE-2026-87898?
Update the Site Import extension to 1.12.2 or later. Plesk → Extensions → Updates → Site Import → Update.
Which versions are affected?
Affected: 1.6.6 – 1.12.1. Update to 1.12.2 or later.

References

Security Advisories

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