What is CVE-2025-68480?

CVE-2025-68480 is a medium-severity vulnerability in Marshmallow-code Marshmallow, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 5.3/10. Published 2025-12-22.

How severe is CVE-2025-68480?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Marshmallow-code Marshmallow

CVE-2025-68480

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 ser…

EPSS: 0.001 (28.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Marshmallow-code Marshmallow — versions >= 3.0.0rc1, < 3.26.2, >= 4.0.0, < 4.1.2

Weakness classification (CWE)

CWE-405 — Asymmetric Resource Consumption (Amplification)

References

https://github.com/marshmallow-code/marshmallow/security/advisories/GHSA-428g-f7cq-pgp5 (x_refsource_CONFIRM)
https://github.com/marshmallow-code/marshmallow/commit/d24a0c9df061c4daa92f71cf85aca25b83eee508 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-68480?: CVE-2025-68480 is a medium-severity vulnerability in Marshmallow-code Marshmallow, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 5.3/10. Published 2025-12-22.
How severe is CVE-2025-68480?: Medium severity. CVSS v3 base score is 5.3 out of 10.