CVE-2026-28795: Openchatbi Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-vmwq-8g8c-jm79
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CWE-22
Published
Advisory Summary

CVE-2026-28795 is a HIGH path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Openchatbi libraries in the PyPI ecosystem. The issue involves openchatbi has a path traversal vulnerability in save_report tool. Remediation is available by upgrading affected packages to version 0.2.2.

CVE-2026-28795 at a Glance

CVE Identifier CVE-2026-28795
GHSA Identifier GHSA-vmwq-8g8c-jm79
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Openchatbi
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2026-28795

To remediate this vulnerability, upgrade all affected Openchatbi dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openchatbi fixed: 0.2.2 
pip install openchatbi>=0.2.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show openchatbi

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-28795, inspect your installed packages using pip:

pip show openchatbi

Analyze the terminal output to locate any version of Openchatbi in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.2), your application is affected.

Note: The pip show openchatbi command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Openchatbi, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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

CVE-2026-28795 Affected Openchatbi Versions

1 component(s)
Fixed Versions:
0.2.2
Product / Package Ecosystem Affected Versions Fixed Version
openchatbi
pypi/openchatbi
PyPI
< 0.2.2
0.2.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/zhongyu09/openchatbi/security/advisories/GHSA-vmwq-8g8c-jm79
NVD — CVE-2026-28795 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28795
Openchatbi Source Repository REPOSITORY
https://github.com/zhongyu09/openchatbi/issues/10
Openchatbi Source Repository REPOSITORY
https://github.com/zhongyu09/openchatbi/pull/12
Security Fix Commit FIX COMMIT
https://github.com/zhongyu09/openchatbi/commit/372a7e861da5159c3106d64d6f6edf8284db8c75
Openchatbi Source Repository REPOSITORY
https://github.com/zhongyu09/openchatbi

Frequently Asked Questions

What is CVE-2026-28795?
CVE-2026-28795 is a security vulnerability in Openchatbi involving OpenChatBI has a Path Traversal Vulnerability in save_report Tool under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Openchatbi versions are affected?
Affected versions include releases prior to 0.2.2 across affected packages: openchatbi.
What version fixes CVE-2026-28795?
Upgrading to 0.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openchatbi affected?
Yes, openchatbi is affected in releases prior to 0.2.2. Upgrade your dependency to 0.2.2 or later.
What CWE is associated with CVE-2026-28795?
CVE-2026-28795 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2026-28795?
Run the dependency tree command: 'pip show openchatbi'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vmwq-8g8c-jm79",
  "modified" : "2026-03-06T21:56:36Z",
  "published" : "2026-03-02T21:47:32Z",
  "aliases" : [ "CVE-2026-28795" ],
  "summary" : "OpenChatBI has a Path Traversal Vulnerability in save_report Tool",
  "details" : "### Impact\nThe `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. \n\nThe 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 \n\n    f\"{timestamp}_{clean_title}.{file_format}\"\n\nmalicious path sequences are preserved, enabling attackers to write files outside the designated report directory. \n\nAn 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.\n\n\n### Patches\n- Affected versions:\n<=0.2.1\n- Patched versions:\n0.2.2 (includes fix from PR #12: https://github.com/zhongyu09/openchatbi/pull/12)\n\n### Workarounds\nNo\n\n### References\n- Issue #10: https://github.com/zhongyu09/openchatbi/issues/10\n- PR #12: https://github.com/zhongyu09/openchatbi/pull/12",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "openchatbi"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.2.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.2.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/zhongyu09/openchatbi/security/advisories/GHSA-vmwq-8g8c-jm79"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28795"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zhongyu09/openchatbi/issues/10"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zhongyu09/openchatbi/pull/12"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zhongyu09/openchatbi/commit/372a7e861da5159c3106d64d6f6edf8284db8c75"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/zhongyu09/openchatbi"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-02T21:47:32Z",
    "nvd_published_at" : "2026-03-06T07:16:00Z"
  }
}