Plesk is a widely used web hosting control panel; an authenticated OS command injection granting root enables full system/hosting takeover across many organizations.
CVE-2026-87898
Authenticated OS command injection in Plesk allows root code execution
do firstUpgrade to a fixed release: < 1.12.2.
Is CVE-2026-87898 being exploited?
Not confirmed. CVE-2026-87898 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 1.1% probability of exploitation in the next 30 days.
How severe is CVE-2026-87898?
CVE-2026-87898 is rated Critical with a CVSS score of 9.4. 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-2026-87898?
Not known from our data. No patch reference has been recorded for CVE-2026-87898, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-87898 affect?
CVE-2026-87898 affects Plesk Control Panel (web hosting servers). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-87898?
Apply vendor patch/mitigations ASAP; restrict admin access, enable MFA, isolate hosts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated remote OS command injection -> arbitrary code execution as root; full system and hosted-site compromise.
Immediate action required
- affected>= 1.6.6 and <= 1.12.1
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.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- total
Assessed by CISA 23 Sept 2026 (SSVC 2.0.3).
timeline
- 23 Sept 2026Published
- 23 Sept 2026CISA SSVC assessment: exploitation none · same day later
- 23 Sept 2026CVE record last updated · same day later
- 24 Sept 2026Analysed by vulneraibility.com · same day later
- Linksupport.plesk.com /hc/en-us/articles/43641151026583
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.