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CVE-2026-58166— OpenBMB ChatDev - Unauthenticated Path Traversal in Upload Handler Allows Arbitrary File Write and Delete

Quick assessment

Affected
OpenBMB ChatDev
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.

OpenBMB ChatDev是OpenBMB团队开源的一款零代码多智能体编排平台，用户无需编程即可通过可视化配置快速构建和执行多智能体工作流，实现从软件开发到数据分析、3D生成、深度研究等各类复杂任务。 OpenBMB ChatDev 2.2.0及之前版本存在路径遍历漏洞，该漏洞源于文件上传端点中的路径遍历漏洞，允许未经身份验证的远程攻击者在save_upload_file函数中通过提交包含路径遍历序列的恶意多部分文件名或绝对路径，在未清理的情况下构造目标路径，从而在服务器文件系统中写入或删除任意文件。

CVSS 9.1 · Critical EPSS 0.85% · P57

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenBMB ChatDev ≤ 2.2.0 affected
4fd4da603801766b14ad8788649cfc1ad21f99a6 unaffected
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I. Basic Information for CVE-2026-58166

Vulnerability Information
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Vulnerability Title
OpenBMB ChatDev - Unauthenticated Path Traversal in Upload Handler Allows Arbitrary File Write and Delete
Source: CVE Program / CVE List V5
Vulnerability Description
OpenBMB ChatDev through 2.2.0, fixed in commit 4fd4da6, contains a path traversal vulnerability that allows unauthenticated remote attackers to write or delete arbitrary files by supplying a malicious multipart filename in the file upload endpoint. Attackers can send a crafted filename containing path traversal sequences or an absolute path to the POST uploads session endpoint, which constructs the destination path without sanitization in save_upload_file, causing file write and cleanup operations to target attacker-chosen paths on the server filesystem.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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
OpenBMB ChatDev 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBMB ChatDev是OpenBMB团队开源的一款零代码多智能体编排平台，用户无需编程即可通过可视化配置快速构建和执行多智能体工作流，实现从软件开发到数据分析、3D生成、深度研究等各类复杂任务。 OpenBMB ChatDev 2.2.0及之前版本存在路径遍历漏洞，该漏洞源于文件上传端点中的路径遍历漏洞，允许未经身份验证的远程攻击者在save_upload_file函数中通过提交包含路径遍历序列的恶意多部分文件名或绝对路径，在未清理的情况下构造目标路径，从而在服务器文件系统中写入或删除任意文件。
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
OpenBMB ChatDev 0 ~ 2.2.0 -

II. Public POCs for CVE-2026-58166

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6905 chars
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III. Intelligence Information for CVE-2026-58166

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Patches & Fixes for CVE-2026-58166 (2)

Vendor Advisories for CVE-2026-58166 (1)

Proof of Concept for CVE-2026-58166 (1)

IV. Related Vulnerabilities

Same vendor: OpenBMB
Same weakness: CWE-22

V. Comments for CVE-2026-58166

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