Plesk is widely used by hosting providers; this LPE to root from a customer/reseller account can compromise multi-tenant servers and is organization-disrupting and newsworthy.
CVE-2026-67394
Plesk local OS command injection lets customers/resellers escalate to root.
Is CVE-2026-67394 being exploited?
Not confirmed. CVE-2026-67394 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.3% probability of exploitation in the next 30 days.
How severe is CVE-2026-67394?
CVE-2026-67394 is rated Critical with a CVSS score of 9.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-67394?
Yes. A fix has been recorded for CVE-2026-67394. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-67394 affect?
CVE-2026-67394 affects Plesk for Linux versions 18.0.34 up to (but not including) 18.0.79.9 and 18.0.80.5. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-67394?
Immediately upgrade to 18.0.79.9 or 18.0.80.5; restrict customer shell access until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local OS command injection allows customer/reseller with shell or shell-change rights to gain root on hosting servers, enabling full host compromise and tenant data/control loss.
Immediate action required
- affected>= 18.0.34 and < 18.0.79.9
- affected>= 18.0.80 and < 18.0.80.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.