cPanel is widely used by hosting providers; an authenticated root RCE across hosting infrastructure would be highly disruptive and newsworthy.
CVE-2026-87899
Authenticated remote code execution to root in cPanel
Is CVE-2026-87899 being exploited?
Not confirmed. CVE-2026-87899 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.
How severe is CVE-2026-87899?
CVE-2026-87899 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-2026-87899?
Not known from our data. No patch reference has been recorded for CVE-2026-87899, 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-2026-87899 affect?
CVE-2026-87899 affects cPanel & WHM, Web hosting servers running cPanel, Managed hosting providers using cPanel. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-87899?
Apply vendor update ASAP; restrict admin access, rotate creds, monitor logs
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attackers can execute arbitrary code as root, enabling full server compromise, data theft, service disruption, and lateral movement.
Immediate action required
- affected>= 11.120.0.0 and < 11.134.0.57
- affected>= 11.136.0.0 and < 11.136.0.41
- affected>= 11.138.0.0 and < 11.138.0.8
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.