CVE-2026-26279
Critical
Description
Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strings in the panel.adminmail setting. This value is later concatenated into a shell command executed as root by a cron job, where the pipe character | is explicitly whitelisted. The result is full root-level Remote Code Execution. This vulnerability is fixed in 2.3.4.
SeverityCritical
CVSS9.1
Exploit probability—
ProductFroxlor
PublishedMar 3, 2026
First seenMar 3, 2026
Weakness typeCWE-78OS command injectionCWE-482CWE-482
How to fix
Update
- froxlor froxlor2.3.4 or later
- froxlor/froxlor2.3.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| froxlor froxlor | v < 2.3.4 | 2.3.4 |
| froxlor/froxlorPackagist | v < 2.3.4 | 2.3.4 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.