---
title: "CVE-2026-53995: MLflow - Path Traversal"
description: "MLflow <= 3.17.1 contains a path traversal caused by crafted trace ID in FileStore tracking backend, letting unauthenticated attackers write files outside intended directories, exploit requires use of FileStore backend."
url: https://panop.io/threat-heartbeat/CVE-2026-53995/
---

# CVE-2026-53995 MLflow - Path Traversal

MLflow <= 3.17.1 contains a path traversal caused by crafted trace ID in FileStore tracking backend, letting unauthenticated attackers write files outside intended directories, exploit requires use of FileStore backend.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-53995)

## Details

Type

Path Traversal

Impact

Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Published

19 October 2026

Updated

20 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Update to MLflow 3.7.0 or later where FileStore is not the default or apply latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-53995](https://nvd.nist.gov/vuln/detail/CVE-2026-53995)
- [https://github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal](https://github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal)
- [https://github.com/mlflow/mlflow/pull/26842](https://github.com/mlflow/mlflow/pull/26842)
- [https://www.vulncheck.com/advisories/mlflow-path-traversal-via-trace-id-api](https://www.vulncheck.com/advisories/mlflow-path-traversal-via-trace-id-api)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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