Marshmallow is a lightweight library for converting complex objects to and from simple Python datatypes. In versions from 3.0.0rc1 to before 3.26.2 and from 4.0.0 to before 4.1.2, Schema.load(data, many=True) is vulnerable to denial of service attacks. A moderately sized request can consume a disproportionate amount of CPU time. This issue has been patched in version 3.26.2 and 4.1.2.

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.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20087-1 advisory.

    - CVE-2025-68480: Fixed possible DoS when using Schema.load(data, many=True) (bsc#1255473).

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:0226-1 advisory.

    - CVE-2025-68480: Fixed possible DoS when using Schema.load(data, many=True) (bsc#1255473).

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

Note that Nessus has not tested for this issue 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:

  - Marshmallow is a lightweight library for converting complex objects to and from simple Python datatypes.
    In versions from 3.0.0rc1 to before 3.26.2 and from 4.0.0 to before 4.1.2, Schema.load(data, many=True) is
    vulnerable to denial of service attacks. A moderately sized request can consume a disproportionate amount
    of CPU time. This issue has been patched in version 3.26.2 and 4.1.2. (CVE-2025-68480)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Marshmallow is a lightweight library for converting complex objects to and from simple Python datatypes.
    In versions from 3.0.0rc1 to before 3.26.2 and from 4.0.0 to before 4.1.2, Schema.load(data, many=True) is     vulnerable to denial of service attacks. A moderately sized request can consume a disproportionate amount     of CPU time. This issue has been patched in version 3.26.2 and 4.1.2. (CVE-2025-68480)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	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	Local	medium
296565	openSUSE 16 Security Update : python-marshmallow (openSUSE-SU-2026:20087-1)	Nessus	SuSE Local Security Checks	Local	medium
296450	SUSE SLES15 / openSUSE 15 Security Update : python-marshmallow (SUSE-SU-2026:0226-1)	Nessus	SuSE Local Security Checks	Local	medium
436478	SCA: security update for marshmallow (GHSA-428g-f7cq-pgp5)	Tenable Cloud Security	SCA Checks	Local	medium
436478	SCA: security update for marshmallow (GHSA-428g-f7cq-pgp5)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
279622	Linux Distros Unpatched Vulnerability : CVE-2025-68480	Nessus	Misc.	Local	medium

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CVE-2025-68480

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