# CVE-2026-65643: Code injection in cPanel

> Remote authenticated users can execute arbitrary code as root via eval injection in cPanel, requiring immediate upgrade.

- **Severity:** High 8.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-3x5r-hcq6-ggfv

## What is CVE-2026-65643?

CVE-2026-65643 is a high-severity code injection vulnerability in Cpanel Cpanel, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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

Weakness: CWE-95 (Improper Neutralization of Directives in Dynamically Evaluated Code)

## Which versions are affected by CVE-2026-65643?

It affects 1 product.


Products: Cpanel Cpanel.

## How do I fix CVE-2026-65643?

No fix has been published for CVE-2026-65643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-65643 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65643 exists.

Public exploit code:

- CVE-2026-65643 – cPanel Domain Parking RCE Toolkit (CVSS 8.7) | Red/Blue Team suite for unpatched cPanel & WHM 11.x (110,134,136,138). 2 tools: Full Exploit (reverse shell, webshell, persistence, root passwd, file R/W, mass scan, Tor), Blue Team PoC (detection, reporting, audit). w/Python. Only Use Ethically, Stay Legal <3  (github_poc): https://github.com/tc4dy/CVE-2026-65643-PoC-Toolkit
- CVE-2026-65643 - Draft or TODO (github_poc): https://github.com/HORKimhab/CVE-2026-65643

## Other vulnerabilities in Cpanel Cpanel

- [CVE-2026-41940](https://insights.sbomify.com/CVE-2026-41940/): WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function (critical 9.3, exploited in the wild)
- [CVE-2003-1425](https://insights.sbomify.com/CVE-2003-1425/): guestbook.cgi in cPanel 5.0 allows remote attackers to execute arbitrary commands via the template parameter. (critical 10.0)
- [CVE-2004-1769](https://insights.sbomify.com/CVE-2004-1769/): Code injection in n/a (critical 10.0)
- [CVE-2004-1770](https://insights.sbomify.com/CVE-2004-1770/): Command injection in n/a (critical 10.0)
- [CVE-2020-26098](https://insights.sbomify.com/CVE-2020-26098/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-65643 and fix it if it is affected.

What it is: CVE-2026-65643 is a high-severity code injection vulnerability in Cpanel Cpanel, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65643 exists.

Affected product: Cpanel Cpanel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-65643/ (Markdown: https://insights.sbomify.com/CVE-2026-65643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-65643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-65643
- OSV: https://osv.dev/vulnerability/CVE-2026-65643

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-65643/
Summaries are generated and may contain mistakes; the official description above is the record.