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CVE-2026-34371— LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal

Quick assessment

Affected
danny-avila LibreChat
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.

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。

CVSS 6.3 · Medium EPSS 0.34% · P25
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
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
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III. Intelligence Information for CVE-2026-34371

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Vendor Advisories for CVE-2026-34371 (1)

IV. Related Vulnerabilities

Same product: LibreChat
Same vendor: danny-avila
Same weakness: CWE-22

V. Comments for CVE-2026-34371

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