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TI-2026-41884 Aliases CVE-2026-58166GHSA-hh77-fhmp-pqfv

OpenBMB ChatDev - Unauthenticated Path Traversal in Upload Handler Allows Arbitrary File Write and Delete

Priority HIGH 77CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00854 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenBMBChatDevup to 2.2.0—Patch availableCNA
  • ChatDev VendorOpenBMB Affected up to 2.2.0 Fixed in — Patch available CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58166
  2. 2026-10-03 Alias added: GHSA-hh77-fhmp-pqfv

References

Exploit 1

Patch 1

Other 1

  • TI-2026-50949 XAgent Path Traversal Arbitrary File Read via /workspace/file CVSS 4.0HIGH 8.7
  • TI-2024-01867 OpenBMB XAgent Privileged Mode sandbox CVSS 3.1HIGH 8.8
  • TI-2026-85970 Code injection in OpenBMB Internet of Agents Code Executor Tool CVSS 4.0MEDIUM 6.9
  • TI-2026-04320 OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication CVSS 4.0MEDIUM 6.9
  • TI-2026-03418 OpenBMB XAgent workspace.py workspace path traversal CVSS 4.0MEDIUM 6.9
  • TI-2026-04318 OpenBMB XAgent API Key function_handler.py FunctionHandler.handle_tool_call log file CVSS 4.0MEDIUM 5.1
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences