GHSA-428G-F7CQ-PGP5

Vulnerability from github – Published: 2025-12-22 20:20 – Updated: 2025-12-23 16:01
VLAI?
Summary
Marshmallow has DoS in Schema.load(many)
Details

Impact

Schema.load(data, many=True) is vulnerable to denial of service attacks. A moderately sized request can consume a disproportionate amount of CPU time.

Patches

4.1.2, 3.26.2

Workarounds

# Fail fast
def load_many(schema, data, **kwargs):
    if not isinstance(data, list):
        raise ValidationError(['Invalid input type.'])
    return [schema.load(item, **kwargs) for item in data]
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "marshmallow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0rc1"
            },
            {
              "fixed": "3.26.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "marshmallow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-68480"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-405"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-22T20:20:07Z",
    "nvd_published_at": "2025-12-22T22:16:09Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n`Schema.load(data, many=True)` is vulnerable to denial of service attacks. A moderately sized request can consume a disproportionate amount of CPU time.\n\n### Patches\n\n4.1.2, 3.26.2\n\n### Workarounds\n\n```py\n# Fail fast\ndef load_many(schema, data, **kwargs):\n    if not isinstance(data, list):\n        raise ValidationError([\u0027Invalid input type.\u0027])\n    return [schema.load(item, **kwargs) for item in data]\n```",
  "id": "GHSA-428g-f7cq-pgp5",
  "modified": "2025-12-23T16:01:21Z",
  "published": "2025-12-22T20:20:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/marshmallow-code/marshmallow/security/advisories/GHSA-428g-f7cq-pgp5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68480"
    },
    {
      "type": "WEB",
      "url": "https://github.com/marshmallow-code/marshmallow/commit/d24a0c9df061c4daa92f71cf85aca25b83eee508"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/marshmallow-code/marshmallow"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Marshmallow has DoS in Schema.load(many)"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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