CVE-2026-34371— LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal
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I. Basic Information for CVE-2026-34371
Vulnerability Information
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Vulnerability Title
LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal
Source: NVD (National Vulnerability Database)
Vulnerability Description
LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
LibreChat 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreChat是LibreChat开源的一个免费、高度可定制的统一 AI 对话平台，能够在一个界面中聚合并运行来自任意厂商的大模型。 LibreChat 0.8.4之前版本存在路径遍历漏洞，该漏洞源于信任execute_code沙箱返回的文件名且未进行清理，可能导致任意文件写入。
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 |
|---|---|---|---|---|
| danny-avila | LibreChat | < 0.8.4 | - |
II. Public POCs for CVE-2026-34371
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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IV. Related Vulnerabilities
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LibreChat 安全漏洞
Same vendor: danny-avila
- CVE-2026-31951
LibreChat's MCP Server Header Injection Enables OAuth Token - CVE-2026-31950
LibreChat's IDOR in SSE Stream Subscription Allows Reading O - CVE-2026-31945
LibreChat Server-Side Request Forgery using DNS resolution - CVE-2026-31943
LibreChat has SSRF protection bypass via IPv4-mapped IPv6 no - CVE-2025-41258
LibreChat RAG API Authentication Bypass
Same weakness: CWE-22
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V. Comments for CVE-2026-34371
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