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 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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/marshmallow-code/marshmallow/commit/d24a0c9df061c4daa92f71cf85aca25b83eee508
https://github.com/marshmallow-code/marshmallow/security/advisories/GHSA-428g-f7cq-pgp5

Configurations

No configuration.

History

19 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Marshmallow es una biblioteca ligera para convertir objetos complejos a y desde tipos de datos simples de Python. En versiones desde 3.0.0rc1 hasta la versión 3.26.2 anterior y desde 4.0.0 hasta la versión 4.1.2 anterior, Schema.load(data, many=True) es vulnerable a ataques de denegación de servicio. Una solicitud de tamaño moderado puede consumir una cantidad desproporcionada de tiempo de CPU. Este problema se ha corregido en la versión 3.26.2 y 4.1.2.

Information

Published : 2025-12-22 22:16

Updated : 2026-10-19 22:10

NVD link : CVE-2025-68480

Mitre link : CVE-2025-68480

CVE.ORG link : CVE-2025-68480

JSON object : View

Products Affected

No product.

CWE

CWE-405

Asymmetric Resource Consumption (Amplification)

{"id": "CVE-2025-68480", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-68480", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-12-22T21:34:43.372078Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "marshmallow-code", "product": "marshmallow", "versions": [{"status": "affected", "version": ">= 3.0.0rc1, < 3.26.2"}, {"status": "affected", "version": ">= 4.0.0, < 4.1.2"}]}]}], "published": "2025-12-22T22:16:09.457", "references": [{"url": "https://github.com/marshmallow-code/marshmallow/commit/d24a0c9df061c4daa92f71cf85aca25b83eee508", "source": "security-advisories@github.com"}, {"url": "https://github.com/marshmallow-code/marshmallow/security/advisories/GHSA-428g-f7cq-pgp5", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-405"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Marshmallow es una biblioteca ligera para convertir objetos complejos a y desde tipos de datos simples de Python. En versiones desde 3.0.0rc1 hasta la versi\u00f3n 3.26.2 anterior y desde 4.0.0 hasta la versi\u00f3n 4.1.2 anterior, Schema.load(data, many=True) es vulnerable a ataques de denegaci\u00f3n de servicio. Una solicitud de tama\u00f1o moderado puede consumir una cantidad desproporcionada de tiempo de CPU. Este problema se ha corregido en la versi\u00f3n 3.26.2 y 4.1.2."}], "lastModified": "2026-10-19T22:10:00.130", "sourceIdentifier": "security-advisories@github.com"}