# CVE-2025-68480: python3-marshmallow: Marshmallow is a lightweight library for converting complex objects to and from simple Python datatypes

CVE-2025-68480 is fixed in 2 products on 1 platform, first by python3-marshmallow 3.4.0-1ubuntu0.1~esm1, released December 22, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-68480
- Priority: Routine
- CVSS: 5.3 (Medium)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 22, 2025

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-marshmallow Debian 13.5 (trixie) | 3.26.2-0+deb13u1 | [DEBIAN-CVE-2025-68480](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68480.md) | Dec 22, 2025 |
| Linux | python-marshmallow Debian 14 | 3.26.2-0.1 | [DEBIAN-CVE-2025-68480](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68480.md) | Dec 22, 2025 |
| Linux | python-marshmallow opensuse-leap 15.6 | 3.20.2-150400.9.10.1 | [SUSE-SU-2026:0226-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0226-1.md) | Jan 22, 2026 |
| Linux | python-marshmallow opensuse-leap 16.0 | 3.20.2-160000.3.1 | [OPENSUSE-SU-2026:20087-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20087-1.md) | Jan 22, 2026 |
| Linux | python-marshmallow sles 15.6 | 3.20.2-150400.9.10.1 | [SUSE-SU-2026:0226-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0226-1.md) | Jan 22, 2026 |
| Linux | python-marshmallow sles 15.7 | 3.20.2-150400.9.10.1 | [SUSE-SU-2026:0226-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0226-1.md) | Jan 22, 2026 |
| Linux | python-marshmallow sles 16.0 | 3.20.2-160000.3.1 | [SUSE-SU-2026:20130-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20130-1.md) | Jan 22, 2026 |
| Linux | python3-marshmallow Ubuntu 20.04 LTS (focal) | 3.4.0-1ubuntu0.1~esm1 | [python3-marshmallow 3.4.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-marshmallow-3.4.0-1ubuntu0.1-esm1.md) | Dec 22, 2025 |
| Linux | python3-marshmallow Ubuntu 22.04.1 LTS (jammy) | 3.13.0-1ubuntu0.1~esm1 | [python3-marshmallow 3.13.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-marshmallow-3.13.0-1ubuntu0.1-esm1.md) | Dec 22, 2025 |
| Linux | python3-marshmallow Ubuntu 24.04.5 LTS (noble) | 3.20.1-1.1ubuntu0.1~esm1 | [python3-marshmallow 3.20.1-1.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-marshmallow-3.20.1-1.1ubuntu0.1-esm1.md) | Dec 22, 2025 |
| Linux | python3-marshmallow Ubuntu 26.04.1 LTS (resolute) | 3.26.1-0.4ubuntu0.1~esm1 | [python3-marshmallow 3.26.1-0.4ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-marshmallow-3.26.1-0.4ubuntu0.1-esm1.md) | Dec 22, 2025 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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