# CVE-2018-17175: python3-marshmallow: In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty...

CVE-2018-17175 is fixed in python3-marshmallow on 1 platform by python3-marshmallow 3.0.0b3-1ubuntu0.1~esm1 (version 3.0.0b3-1ubuntu0.1~esm1), released September 18, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-17175
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0192
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2018

## Description

In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty list as implying no "only" option, which allows a request that was intended to expose no fields to instead expose all fields (if the schema is being filtered dynamically using the "only" option, and there is a user role that produces an empty value for "only").

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python3-marshmallow Ubuntu 18.04.6 LTS (bionic) | 3.0.0b3-1ubuntu0.1~esm1 | [python3-marshmallow 3.0.0b3-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-marshmallow-3.0.0b3-1ubuntu0.1-esm1.md) | Sep 18, 2018 |

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