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").

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8225-1 advisory.

    Jared Deckard discovered that Python marshmallow did not correctly handle hiding certain fields. An     attacker could possibly use this issue to leak sensitive information. This issue only affected Ubuntu     18.04 LTS. (CVE-2018-17175)

    It was discovered that Python marshmallow did not efficiently handle merging certain objects. An attacker     could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS,     Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2025-68480)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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"). (CVE-2018-17175)

Security fix for CVE-2018-17175

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
311780	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Python marshmallow vulnerabilities (USN-8225-1)	Nessus	Ubuntu Local Security Checks	medium
422616	SCA: security update for marshmallow (GHSA-9q2p-fj49-vpxj)	Tenable Cloud Security	SCA Checks	medium
422616	SCA: security update for marshmallow (GHSA-9q2p-fj49-vpxj)	Tenable Self-Hosted Container Security	SCA Checks	medium
120796	Fedora 28 : python-marshmallow (2018-cc9adc4808)	Nessus	Fedora Local Security Checks	medium
120614	Fedora 29 : python-marshmallow (2018-9006b64e41)	Nessus	Fedora Local Security Checks	medium
118046	Fedora 27 : python-marshmallow (2018-8b109a6de0)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2018-17175

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium