CVE-2025-68480CWE-405

CVE-2025-68480

Medium · published December 23, 2025

CVSS v3.1
5.3
EPSS
0%
Percentile
21.1
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00296 · 21.1th percentile
Weakness
CWE-405 · Asymmetric Resource Consumption (Amplification)
Published
2025-12-23T03:16Z
References (2)
https://github.com/marshmallow-code/marshmallow/commit/d24a0c9df061c4daa92f71cf85aca25b83eee508 · [email protected]https://github.com/marshmallow-code/marshmallow/security/advisories/GHSA-428g-f7cq-pgp5 · [email protected]
EPSS history
Timeline
  • 22 DEC 21:20Z
    Marshmallow has DoS in Schema.load(many)
    cvelistv5