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CVE-2025-66446— MaxKB has a Python sandbox LD_PRELOAD bypass

Quick assessment

Affected
1Panel-dev MaxKB
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.

MaxKB是1Panel-dev开源的一款基于大语言模型和 RAG 的开源知识库问答系统。 MaxKB 2.3.1及之前版本存在竞争条件问题漏洞，该漏洞源于文件权限设置不当，可能导致覆盖内置动态链接器和其他关键文件，进而导致权限提升。

CVSS 8.8 · High EPSS 0.35% · P26
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I. Basic Information for CVE-2025-66446

Vulnerability Information
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Vulnerability Title
MaxKB has a Python sandbox LD_PRELOAD bypass
Source: CVE Program / CVE List V5
Vulnerability Description
MaxKB is an open-source AI assistant for enterprise. Versions 2.3.1 and below have improper file permissions which allow attackers to overwrite the built-in dynamic linker and other critical files, potentially resulting in privilege escalation. This issue is fixed in version 2.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
MaxKB 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MaxKB是1Panel-dev开源的一款基于大语言模型和 RAG 的开源知识库问答系统。 MaxKB 2.3.1及之前版本存在竞争条件问题漏洞，该漏洞源于文件权限设置不当，可能导致覆盖内置动态链接器和其他关键文件，进而导致权限提升。
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
1Panel-dev MaxKB < 2.4.0 -

II. Public POCs for CVE-2025-66446

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7536 chars
Pro+ exclusive includes:
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-2025-66446

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Vendor Advisories for CVE-2025-66446 (1)

Other References for CVE-2025-66446 (1)

IV. Related Vulnerabilities

Same product: MaxKB
Same vendor: 1Panel-dev
Same weakness: CWE-362

V. Comments for CVE-2025-66446

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