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CVE-2026-44450— Lumiverse: RCE via MCP stdio argument injection

Quick assessment

Affected
prolix-oc Lumiverse
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lumiverse是Prolix OCs个人开发者的一个全功能AI聊天应用套件。 Lumiverse 0.9.7之前版本存在参数注入漏洞，该漏洞源于MCP服务器创建端点验证命令字段但未验证args数组，允许列表中的每个二进制文件都接受内联代码执行标志，任何登录用户可通过任意OS级代码执行，且服务器绑定所有接口且主机标头重绑定检查可被绕过。

CVSS 9.9 · Critical EPSS 0.68% · P51

Affected Version Matrix 1

VendorProduct Version RangeStatus
prolix-oc Lumiverse < 0.9.7 affected
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I. Basic Information for CVE-2026-44450

Vulnerability Information
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Vulnerability Title
Lumiverse: RCE via MCP stdio argument injection
Source: CVE Program / CVE List V5
Vulnerability Description
Lumiverse is a full-featured AI chat application. Prior to 0.9.7, the MCP server creation endpoint validates the command field against an allowlist of binary names but forwards the args array to the child process without any validation. Every binary on the allowlist accepts an inline-code execution flag (-e for node/bun, -c for python3/deno), giving any logged-in user arbitrary OS-level code execution on the Lumiverse server. The route requires only requireAuth (not requireOwner). The server binds on all interfaces (::) and the host-header rebinding check is bypassed trivially by any HTTP client that sends Host: localhost:<port> directly, making this exploitable from any machine with network access to the server port. This vulnerability is fixed in 0.9.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
Lumiverse 参数注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lumiverse是Prolix OCs个人开发者的一个全功能AI聊天应用套件。 Lumiverse 0.9.7之前版本存在参数注入漏洞，该漏洞源于MCP服务器创建端点验证命令字段但未验证args数组，允许列表中的每个二进制文件都接受内联代码执行标志，任何登录用户可通过任意OS级代码执行，且服务器绑定所有接口且主机标头重绑定检查可被绕过。
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
prolix-oc Lumiverse < 0.9.7 -

II. Public POCs for CVE-2026-44450

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III. Intelligence Information for CVE-2026-44450

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Vendor Advisories for CVE-2026-44450 (1)

Same Patch Batch · prolix-oc · 2026-05-26 · 5 CVEs total

CVE-2026-44451 9.3 CRITICAL Lumiverse: TSX component sandbox escape via DOM ref and string-split identifier bypass
CVE-2026-44449 9.1 CRITICAL Lumiverse: SMB `exists()` basename injection via smbclient `!cmd` escape
CVE-2026-44444 9.1 CRITICAL Lumiverse: Spindle extension install runs untrusted lifecycle scripts before security scan
CVE-2026-44443 4.8 MEDIUM Lumiverse: Sign-up nonce race condition allows unauthorized account registration

IV. Related Vulnerabilities

Same product: Lumiverse
Same vendor: prolix-oc
Same weakness: CWE-88

V. Comments for CVE-2026-44450

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