fix(deps): update dependency fastify to v5.3.2 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
fastify (source)	5.2.2 -> 5.3.2

GitHub Vulnerability Alerts

CVE-2025-32442

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.

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

---

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

CVE-2025-32442 / GHSA-mg2h-6x62-wpwc

More information

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.

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

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

• https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc
• https://nvd.nist.gov/vuln/detail/CVE-2025-32442
• https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418
• https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4
• https://hackerone.com/reports/3087928
• https://github.com/fastify/fastify

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

Release Notes

fastify/fastify (fastify)

v5.3.2

Compare Source

v5.3.1

Compare Source

v5.3.0

Compare Source

What's Changed

• fix: wrong reply return type by @​dangkyokhoang in https://github.com/fastify/fastify/pull/6026
• feat: allow to access decorators by @​jean-michelet in https://github.com/fastify/fastify/pull/5768
• ci: continue-on-error on alternative runtime by @​Eomm in https://github.com/fastify/fastify/pull/6031
• fix: clear [kState].readyPromise for garbage collection by @​LiviaMedeiros in https://github.com/fastify/fastify/pull/6030
• ci: set workflow permissions to read-only by default by @​Fdawgs in https://github.com/fastify/fastify/pull/6035
• chore: Bump the dependencies-major group with 2 updates by @​dependabot in https://github.com/fastify/fastify/pull/6036
• chore: Bump lycheeverse/lychee-action from 2.3.0 to 2.4.0 by @​dependabot in https://github.com/fastify/fastify/pull/6037
• chore: remove sponsort by @​Eomm in https://github.com/fastify/fastify/pull/6040
• test: fix skip in upgrade test by @​LiviaMedeiros in https://github.com/fastify/fastify/pull/6044
• chore: migrate custom-parser.4.test.js to node:test by @​Matthew-Mallimo in https://github.com/fastify/fastify/pull/6042
• docs: add fastify-lm to Ecosystem.md by @​galiprandi in https://github.com/fastify/fastify/pull/6032
• test: skip IPv6 tests if its support is not present by @​LiviaMedeiros in https://github.com/fastify/fastify/pull/6048

New Contributors

• @​dangkyokhoang made their first contribution in https://github.com/fastify/fastify/pull/6026
• @​Matthew-Mallimo made their first contribution in https://github.com/fastify/fastify/pull/6042
• @​galiprandi made their first contribution in https://github.com/fastify/fastify/pull/6032

Full Changelog: fastify/fastify@v5.2.2...v5.3.0

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