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Vulnerability record · CVE-2026-26279 · published 3 March 2026

CVE-2026-26279: Froxlor os command injection vulnerability

Froxlor · Froxlor

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.

9.1 CVSS 3.1 Critical EPSS 1.1% · top 35.6% CWE-78 · OS command injectionCWE-482 · CWE-482
9.1CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/froxlor/Froxlor/security/advisories/GHSA-33mp-8p67-xj7c ExploitMitigationVendor Advisory
https://github.com/froxlor/froxlor/commit/22249677107f8f39f8d4a238605641e87dab4343 Patch
https://github.com/froxlor/froxlor/releases/tag/2.3.4 Release Notes

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-41228Froxlor php remote file inclusion vulnerabilityFroxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does…EPSS 0.75%9.8CVE-2023-3173Froxlor improper restriction of authentication attempts vulnerabilityImproper Restriction of Excessive Authentication Attempts in GitHub repository froxlor/froxlor prior to 2.0.20.EPSS 1.1%9.8CVE-2023-1307Froxlor vulnerabilityAuthentication Bypass by Primary Weakness in GitHub repository froxlor/froxlor prior to 2.0.13.EPSS 1.1%9.8CVE-2021-42325Froxlor sql injection vulnerabilityFroxlor through 0.10.29.1 allows SQL injection in Database/Manager/DbManagerMySQL.php via a custom DB name.EPSS 12%9.8CVE-2015-5959Froxlor information exposure vulnerabilityFroxlor before 0.9.33.2 with the default configuration/setup might allow remote attackers to obtain the database password by reading /logs/sql-error.…EPSS 3.1%9.8CVE-2016-5100Froxlor vulnerabilityFroxlor before 0.9.35 uses the PHP rand function for random number generation, which makes it easier for remote attackers to guess the password reset…EPSS 1.9%9.1CVE-2026-41229Froxlor code injection vulnerabilityFroxlor is open source server administration software. Prior to version 2.3.6, `PhpHelper::parseArrayToString()` writes string values into single-quo…EPSS 0.69%8.8CVE-2023-6069Froxlor link following vulnerabilityImproper Link Resolution Before File Access in GitHub repository froxlor/froxlor prior to 2.1.0.EPSS 0.83%

Source: NIST National Vulnerability Database (record CVE-2026-26279), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.