CVE-2026-58166
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk46th percentile — higher than 46% of all known CVEs
Summary
OpenBMB ChatDev through version 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.
Risk Assessment
The risk for the organization includes the ability to remotely write or delete arbitrary files on the server, which can lead to application takeover, modification of critical data, or complete compromise of system integrity.
Recommendation
Immediately update OpenBMB ChatDev to a version containing commit 4fd4da6 or later, and implement filename validation and sanitization in the upload endpoint.
Original NVD description (English source)
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.