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CVE-2026-26279— Froxlor Admin-to-Root Privilege Escalation via Input Validation Bypass + OS Command Injection

Quick assessment

Affected
froxlor Froxlor
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Froxlor是Froxlor团队的一套轻量级服务器管理软件。 Froxlor 2.3.4之前版本存在安全漏洞，该漏洞源于输入验证代码中的拼写错误完全禁用了电子邮件格式检查，可能导致经过身份验证的管理员在panel.adminmail设置中存储任意字符串，进而造成根级别远程代码执行。

CVSS 9.1 · Critical EPSS 1.15% · P66
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I. Basic Information for CVE-2026-26279

Vulnerability Information
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Vulnerability Title
Froxlor Admin-to-Root Privilege Escalation via Input Validation Bypass + OS Command Injection
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Froxlor 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Froxlor是Froxlor团队的一套轻量级服务器管理软件。 Froxlor 2.3.4之前版本存在安全漏洞，该漏洞源于输入验证代码中的拼写错误完全禁用了电子邮件格式检查，可能导致经过身份验证的管理员在panel.adminmail设置中存储任意字符串，进而造成根级别远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
froxlor Froxlor < 2.3.4 -

II. Public POCs for CVE-2026-26279

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7678 chars
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III. Intelligence Information for CVE-2026-26279

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Patches & Fixes for CVE-2026-26279 (1)

Vendor Advisories for CVE-2026-26279 (1)

Vendor Pages for CVE-2026-26279 (1)

IV. Related Vulnerabilities

Same product: Froxlor
Same vendor: froxlor
Same weakness: CWE-78

V. Comments for CVE-2026-26279

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