CVE-2025-68480
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductMarshmallow
PublishedDec 22, 2025
First seenDec 22, 2025
Weakness typeCWE-405CWE-405
How to fix
Update
- marshmallow3.26.2, 4.1.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| marshmallowPyPI | 3.0.0rc1 ≤ v < 3.26.2, 4.0.0 ≤ v < 4.1.2 | 3.26.2, 4.1.2 |
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