CVE-2026-34234

10.0 CRITICAL 3% exploit odds Fix listed Injection Web app

What it is

CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the web-based installer (public/installer/index.php) is vulnerable to unauthenticated Remote Code Execution (RCE) because it performs the install.lock check only after including and executing form handler files, leaving installer endpoints reachable on already-installed instances. The handlers also pass unsanitized user input directly into shell commands, allowing an attacker to submit crafted requests that execute arbitrary commands on the server. The vulnerability stems from two combined weaknesses: (1) premature form handler execution before the lock file gate, and (2) unsafe use of user input in shell command construction. This issue is reported to be actively exploited in the wild. The issue has been fixed in version 1.2.0.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 3.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-03-26 16:22 UTC ReservedThe CVE id was reserved by its CNA
2026-05-19 22:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-07-24 09:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.2% in the next 30 days (EPSS).
Severity: 10.0 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-05-19 22:16 UTC
Last modified: 2026-07-24 09:10 UTC
Exploit probability: 3.2% · EPSS, next 30 days
Weakness: CWE-78 · OS command injection
Record status: Deferred

Attack profile CVSS 3.1 · 10.0

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-34234.md and follow it. Check whether this project is affected by CVE-2026-34234. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record