CVE-2025-68480 - CVE House
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Status published Medium CVE-2025-68480

Marshmallow has DoS in Schema.load(many)

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

Affected Vendor

marshmallow-code

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Affected Software

marshmallow
Vulnerable Versions:
>= 3.0.0rc1, < 3.26.2, >= 4.0.0, < 4.1.2

Timeline

Official Publish: December 22nd, 2025
Last Modified: December 22nd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-405

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.