CVE-2025-68480

MEDIUM

marshmallow 3.0.0rc1-3.26.1 and 4.0.0-4.1.1 - Denial of Service via Schema.load

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 5.3
EPSS 0.0025
EPSS Percentile 16.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-405
Status published
Products (3)
marshmallow-code/marshmallow >= 3.0.0rc1, < 3.26.2
marshmallow-code/marshmallow >= 4.0.0, < 4.1.2
pypi/marshmallow 3.0.0rc1 - 3.26.2PyPI
Published Dec 22, 2025
Tracked Since Feb 18, 2026