# CVE-2026-65643 — WebPros cPanel

> As of 2026-09-02, CVE-2026-65643 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in WebPros cPanel, CVSS v4.0 8.7, EPSS 0.8% (57.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-65643, most recently “CVE-2026-65643: Arbitrary File Creation in cPanel/WHM Domain Parking Leads to Root-Level Code Execution”.

**Last updated:** 2026-09-02

## What is CVE-2026-65643?

Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as root.

The record classifies CVE-2026-65643 under weakness class [CWE-95](https://intel.threadlinqs.com/cwe/CWE-95). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 39 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 8.7 — High (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.8% probability of exploitation in the next 30 days, higher than 57.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 8.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-01, last modified 2026-09-02

## Is CVE-2026-65643 being exploited?

Weaponised exploit code for CVE-2026-65643 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 48 in the Threadlinqs vulnerability feed.

- [tc4dy/CVE-2026-65643-PoC-Toolkit](https://github.com/tc4dy/CVE-2026-65643-PoC-Toolkit) (github)
- [HORKimhab/CVE-2026-65643](https://github.com/HORKimhab/CVE-2026-65643) (github)

## Affected products and versions

- [WebPros](https://intel.threadlinqs.com/vendors/webpros): cPanel

## How to fix CVE-2026-65643

No vendor patch reference has been recorded for CVE-2026-65643 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-65643

1 tracked threat in the Threadlinqs corpus references CVE-2026-65643, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CVE-2026-65643: Arbitrary File Creation in cPanel/WHM Domain Parking Leads to Root-Level Code Execution](https://intel.threadlinqs.com/threat/TL-2026-2177) — CRITICAL · 2026-08-28

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [support.cpanel.net](https://support.cpanel.net/hc/en-us/articles/42959571221527-Security-CVE-2026-65643-Park-API-Vulnerability-August-27-2026)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-65643
Full detection coverage and IOCs for threats exploiting CVE-2026-65643 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp