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 contains a path traversal vulnerability in the file upload endpoint. An unauthenticated attacker can write or delete arbitrary files on the server by sending a malicious filename with path traversal sequences.
Risk Assessment
An attacker can overwrite critical system or configuration files, leading to server compromise or complete data loss. The vulnerability is especially dangerous because it requires no authentication.
Recommendation
Immediately update OpenBMB ChatDev to a version containing commit 4fd4da6 or later. In the meantime, restrict access to the file upload endpoint to trusted networks only.
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.