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Plesk CVE-2026-68492: Untrusted Search Path

Plesk is affected by CVE-2026-68492. An untrusted search path vulnerability in Plesk from 18.0.34 before 18.0.80.8 and 18.0.81 before 18.0.81.1 allows remote authenticated users to execute arbitrary code as root via the "Plesk RESTful API". Affected versions: 18.0.34 before 18.0.80.8 | 18.0.81 before 18.0.81.1 | 2.4.2 before 2.4.7. Fixed in 18.0.80.8 / 18.0.81.1. CVSS base score: 8.7.

Critical 8.7 CVSS
Plesk AlmaLinux 8 AlmaLinux 9 CloudLinux 8 CloudLinux 9 Debian 11 Debian 12 Ubuntu 20.04 Ubuntu 22.04

Affected Versions

18.0.34 before 18.0.80.8 | 18.0.81 before 18.0.81.1 | 2.4.2 before 2.4.7

Patched Version

18.0.80.8 / 18.0.81.1

Default Update CMD

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

Fix Commands

AlmaLinux / Ubuntu / Debian / CloudLinux / Rocky Linux

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

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.

An untrusted search path vulnerability in Plesk from 18.0.34 before 18.0.80.8 and 18.0.81 before 18.0.81.1 allows remote authenticated users to execute arbitrary code as root via the “Plesk RESTful API” extension from 2.4.2 before 2.4.7.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-68492

Frequently Asked Questions

What is CVE-2026-68492?
An untrusted search path vulnerability in Plesk from 18.0.34 before 18.0.80.8 and 18.0.81 before 18.0.81.1 allows remote authenticated users to execute arbitrary code as root via the "Plesk RESTful API". Affected versions: 18.0.34 before 18.0.80.8 | 18.0.81 before 18.0.81.1 | 2.4.2 before 2.4.7. Fixed in 18.0.80.8 / 18.0.81.1.
Is CVE-2026-68492 being exploited in the wild?
No confirmed public exploitation has been announced at the time of writing. With a CVSS base score of 8.7, apply the update on your next maintenance window and watch the vendor advisory for changes.
How do I fix CVE-2026-68492?
plesk installer --select-release-current --reinstall-patch. plesk version.
Which versions are affected?
Affected: 18.0.34 before 18.0.80.8 | 18.0.81 before 18.0.81.1 | 2.4.2 before 2.4.7. Update to 18.0.80.8 / 18.0.81.1 or later.

References

Security Advisories

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