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CVE-2026-55477— Authenticated Arbitrary File Write via Database Import and Xray Log Path Manipulation

Quick assessment

Affected
MHSanaei 3x-ui
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.

mhsanaei 3x-ui是mhsanaei个人开发者开源的一个面板管理工具。 MHSanaei 3X-UI 3.3.1之前版本存在输入验证错误漏洞，该漏洞源于滥用数据库导入功能，通过修改数据库中存储的Xray配置值实现对主机上的任意文件写入，可能导致代码执行和持久访问。

CVSS 7.2 · High EPSS 0.61% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
MHSanaei 3x-ui < 3.3.1 affected
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I. Basic Information for CVE-2026-55477

Vulnerability Information
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Vulnerability Title
Authenticated Arbitrary File Write via Database Import and Xray Log Path Manipulation
Source: CVE Program / CVE List V5
Vulnerability Description
3X-UI is a web control panel for managing Xray-core servers. Prior to 3.3.1, an authenticated administrator can abuse the database import functionality to achieve arbitrary file write on the host by modifying Xray configuration values stored in the database. This can be leveraged to obtain code execution and persistent access as the user running Xray (including root when Xray is running as root). This vulnerability is fixed in 3.3.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
MHSanaei 3X-UI 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
mhsanaei 3x-ui是mhsanaei个人开发者开源的一个面板管理工具。 MHSanaei 3X-UI 3.3.1之前版本存在输入验证错误漏洞，该漏洞源于滥用数据库导入功能，通过修改数据库中存储的Xray配置值实现对主机上的任意文件写入，可能导致代码执行和持久访问。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MHSanaei 3x-ui < 3.3.1 -

II. Public POCs for CVE-2026-55477

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8116 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-55477

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Vendor Advisories for CVE-2026-55477 (1)

IV. Related Vulnerabilities

Same weakness: CWE-73

V. Comments for CVE-2026-55477

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