Path Traversal Vulnerability in OpenBMB ChatDev by OpenBMB
CVE-2026-58166

8.8HIGH

Key Information:

Vendor

Openbmb

Status
Chatdev
Vendor
CVE Published:
30 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-58166?

The OpenBMB ChatDev application through version 2.2.0 is affected by a path traversal vulnerability that allows unauthenticated remote attackers to manipulate file upload operations. By sending a malicious multipart filename to the file upload endpoint, attackers can exploit the inadequate sanitization of destination paths. This enables them to overwrite or delete arbitrary files on the server, leading to significant security risks. A fix has been implemented in commit 4fd4da6 to mitigate this vulnerability. It is crucial for users to update to the latest version to prevent potential exploitation.

Affected Version(s)

ChatDev 0 <= 2.2.0

ChatDev 0 <= 2.2.0

ChatDev 4fd4da603801766b14ad8788649cfc1ad21f99a6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-58166 - Proof of Concept

References

https://github.com/OpenBMB/ChatDev/issues/638
technical-descriptionexploit
https://github.com/OpenBMB/ChatDev/pull/641
issue-tracking
https://github.com/OpenBMB/ChatDev/commit/4fd4da603801766...
patch

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.