CVE-2026-26279: critical vulnerability in Froxlor
Froxlor Admin-to-Root Privilege Escalation via Input Validation Bypass + OS Command Injection
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.9%
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
froxlor · FroxlorRelated CVEs — Froxlor
In the same product, most dangerous first.
CVE-2024-34070CRITICALFroxlor Vulnerable to Blind XSS Leading to Froxlor Application CompromiseEPSS 1.0%CVE-2026-90767HIGHFroxlor before 2.3.12 SSH Key Injection via authorized_keysEPSS 0.4%CVE-2025-48958MEDIUMFroxlor has an HTML Injection VulnerabilityEPSS 0.4%CVE-2025-29773MEDIUMFroxlor allows Multiple Accounts to Share the Same Email Address Leading to Potential Privilege Escalation or Account TakeoverEPSS 0.3%