8.8High
Cpanel Cpanel
CVE-2026-65643
Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as root.
What this means for your business
- It affects Cpanel. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an ordinary user login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.9% chance of attack attempts being seen in the next 30 days, ranking above 58% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Cpanel, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Fastnexa security experts
Not sure if your company is exposed to CVE-2026-65643?
Tell us where you run Cpanel Cpanel and a Fastnexa penetration tester will check whether this flaw, or others like it, can be used against your websites, apps and network.
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Scoring
- CVSS
- 8.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- CVSS v4
- 8.7
- Weakness
- CWE-95
- Assigned by
- support@hackerone.com
Dates
- Published
- 2026-09-01
- Last modified
- 2026-09-17
- Sources
- NVD
Affected products
- Cpanel Cpanel- 110.0.141, 112.0.0 - 134.0.53, 136.0.0 - 136.0.37, 138.0.0 - 138.0.2, 138.1.0 - 138.1.7
As listed in the NVD configuration data. Not a statement about your estate.