Vulnerability-Lookup

CVE-2025-32442 (GCVE-0-2025-32442)

Vulnerability from cvelistv5 – Published: 2025-04-18 15:59 – Updated: 2025-08-22 20:50

Title

Fastify vulnerable to invalid content-type parsing, which could lead to validation bypass

Summary

Fastify is a fast and low overhead web framework, for Node.js. In versions 5.0.0 to 5.3.0 as well as version 4.29.0, applications that specify different validation strategies for different content types have a possibility to bypass validation by providing a _slightly altered_ content type such as with different casing or altered whitespacing before `;`. This was patched in v5.3.1, but the initial patch did not cover all problems. This has been fully patched in v5.3.2 and v4.29.1. A workaround involves not specifying individual content types in the schema.

Severity ?

7.5 (High)


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

CWE

CWE-1287 - Improper Validation of Specified Type of Input

Assigner

GitHub_M

References

URL

Tags

	https://github.com/fastify/fastify/security/advis…	x_refsource_CONFIRM
	https://github.com/fastify/fastify/commit/436da4c…	x_refsource_MISC
	https://github.com/fastify/fastify/commit/f3d2bcb…	x_refsource_MISC
	https://hackerone.com/reports/3087928	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	fastify	fastify	Affected: >= 5.0.0, < 5.3.2 Affected: = 4.29.0

Show details on NVD website

JSON

To clipboard

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GHSA-MG2H-6X62-WPWC

Vulnerability from github – Published: 2025-04-18 15:02 – Updated: 2025-05-29 21:04

Summary

Fastify vulnerable to invalid content-type parsing, which could lead to validation bypass

Details

Impact

In applications that specify different validation strategies for different content types, it's possible to bypass the validation by providing a slightly altered content type such as with different casing or altered whitespacing before ;.

Users using the the following pattern are affected:

fastify.post('/', {
  handler(request, reply) {
    reply.code(200).send(request.body)
  },
  schema: {
    body: {
      content: {
        'application/json': {
          schema: {
            type: 'object',
            properties: {
              'foo': {
                type: 'string',
              }
            },
            required: ['foo']
          }
        },
      }
    }
  }
})

User using the following pattern are not affected:

fastify.post('/', {
  handler(request, reply) {
    reply.code(200).send(request.body)
  },
  schema: {
    body: {
      type: 'object',
      properties: {
        'foo': {
          type: 'string',
        }
      },
      required: ['foo']
    }
  }
})

Patches

This was patched in v5.3.1, but unfortunately it did not cover all problems. This has been fully patched in v5.3.2. Version v4.9.0 was also affected by this issue. This has been fully patched in v4.9.1.

Workarounds

Do not specify multiple content types in the schema.

References

Are there any links users can visit to find out more?

https://hackerone.com/reports/3087928

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.3.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "fastify"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "fastify"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.29.0"
            },
            {
              "fixed": "4.29.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.29.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-32442"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-18T15:02:41Z",
    "nvd_published_at": "2025-04-18T16:15:23Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nIn applications that specify different validation strategies for different content types, it\u0027s possible to bypass the validation by providing a _slightly altered_ content type such as with different casing or altered whitespacing before `;`.\n\nUsers using the the following pattern are affected:\n\n```js\nfastify.post(\u0027/\u0027, {\n  handler(request, reply) {\n    reply.code(200).send(request.body)\n  },\n  schema: {\n    body: {\n      content: {\n        \u0027application/json\u0027: {\n          schema: {\n            type: \u0027object\u0027,\n            properties: {\n              \u0027foo\u0027: {\n                type: \u0027string\u0027,\n              }\n            },\n            required: [\u0027foo\u0027]\n          }\n        },\n      }\n    }\n  }\n})\n```\n\nUser using the following pattern are **not** affected:\n\n```js\nfastify.post(\u0027/\u0027, {\n  handler(request, reply) {\n    reply.code(200).send(request.body)\n  },\n  schema: {\n    body: {\n      type: \u0027object\u0027,\n      properties: {\n        \u0027foo\u0027: {\n          type: \u0027string\u0027,\n        }\n      },\n      required: [\u0027foo\u0027]\n    }\n  }\n})\n```\n\n### Patches\n\nThis was patched in v5.3.1, but unfortunately it did not cover all problems. This has been fully patched in v5.3.2.\nVersion v4.9.0 was also affected by this issue. This has been fully patched in v4.9.1.\n\n### Workarounds\n\nDo not specify multiple content types in the schema.\n\n### References\n_Are there any links users can visit to find out more?_\n\nhttps://hackerone.com/reports/3087928",
  "id": "GHSA-mg2h-6x62-wpwc",
  "modified": "2025-05-29T21:04:54Z",
  "published": "2025-04-18T15:02:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32442"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3087928"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fastify/fastify"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Fastify vulnerable to invalid content-type parsing, which could lead to validation bypass"
}

FKIE_CVE-2025-32442

Vulnerability from fkie_nvd - Published: 2025-04-18 16:15 - Updated: 2025-08-22 21:15

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418	Patch
security-advisories@github.com	https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4	Patch
security-advisories@github.com	https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc	Exploit, Third Party Advisory
security-advisories@github.com	https://hackerone.com/reports/3087928	Permissions Required

Impacted products

	Vendor	Product	Version
	fastify	fastify	*
	fastify	fastify	4.29.0

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "8C3A81A7-33F6-491A-992C-FBD944597D42",
              "versionEndExcluding": "5.3.2",
              "versionStartIncluding": "5.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fastify:fastify:4.29.0:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "10266904-B1D6-47CF-8F45-18FB744FC761",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fastify is a fast and low overhead web framework, for Node.js. In versions 5.0.0 to 5.3.0 as well as version 4.29.0, applications that specify different validation strategies for different content types have a possibility to bypass validation by providing a _slightly altered_ content type such as with different casing or altered whitespacing before `;`. This was patched in v5.3.1, but the initial patch did not cover all problems. This has been fully patched in v5.3.2 and v4.29.1. A workaround involves not specifying individual content types in the schema."
    },
    {
      "lang": "es",
      "value": "Fastify es un framework web r\u00e1pido y de bajo consumo para Node.js. En las versiones 5.0.0 a 5.3.0, las aplicaciones que especifican diferentes estrategias de validaci\u00f3n para distintos tipos de contenido pueden omitir la validaci\u00f3n proporcionando un tipo de contenido ligeramente modificado, como con may\u00fasculas y min\u00fasculas diferentes o con espacios antes de `;` modificados. Esto se solucion\u00f3 en la versi\u00f3n 5.3.1, pero la correcci\u00f3n inicial no solucion\u00f3 todos los problemas. Se ha corregido completamente en la versi\u00f3n 5.3.2. Un workaround consiste en no especificar tipos de contenido individuales en el esquema."
    }
  ],
  "id": "CVE-2025-32442",
  "lastModified": "2025-08-22T21:15:31.630",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-04-18T16:15:23.327",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
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      "url": "https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Permissions Required"
      ],
      "url": "https://hackerone.com/reports/3087928"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1287"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-32442 (GCVE-0-2025-32442)

GHSA-MG2H-6X62-WPWC

Impact

Patches

Workarounds

References

FKIE_CVE-2025-32442

Tags

Sightings

Nomenclature