CVE-2026-28795
OpenChatBI has a Path Traversal Vulnerability in save_report Tool
Description
### Impact The `save_report` tool in `openchatbi/tool/save_report.py` suffers from a critical path traversal vulnerability due to insufficient input sanitization of the `file_format` parameter. The function only removes leading dots of `file_format` using `file_format.lstrip(".")` but allows path traversal sequences like `/../../` to pass through unchanged. When the filename is constructed via string concatenation in f"{timestamp}_{clean_title}.{file_format}" malicious path sequences are preserved, enabling attackers to write files outside the designated report directory. An attacker can manipulate the LLM to call the tool with a specific `file_format` to overwrite critical system files like `__init__.py`, potentially leading to remote code execution. ### Patches - Affected versions: <=0.2.1 - Patched versions: 0.2.2 (includes fix from PR #12: https://github.com/zhongyu09/openchatbi/pull/12) ### Workarounds No ### References - Issue #10: https://github.com/zhongyu09/openchatbi/issues/10 - PR #12: https://github.com/zhongyu09/openchatbi/pull/12
How to fix CVE-2026-28795
To remediate CVE-2026-28795, upgrade the affected package to a fixed version below.
- —upgrade to 0.2.2 or later
Is CVE-2026-28795 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.2.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |