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Vulnerability record · CVE-2026-67394 · published 1 September 2026

CVE-2026-67394: OS command injection vulnerability

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.

9.0 CVSS 4.0 Critical EPSS 1.3% · top 31.0% CWE-78 · OS command injection Undergoing Analysis
9.0CVSS 4.0 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
3 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://support.plesk.com/hc/en-us/articles/42968165026967-CVE-2026-67394-Vulnerability-in-Plesk-allows-privilege-escala

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Source: NIST National Vulnerability Database (record CVE-2026-67394), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.