Skip to content

chore(deps): update dependency fastify to v5 [security]#3370

Open
renovate[bot] wants to merge 1 commit intomainfrom
renovate/npm-fastify-vulnerability
Open

chore(deps): update dependency fastify to v5 [security]#3370
renovate[bot] wants to merge 1 commit intomainfrom
renovate/npm-fastify-vulnerability

Conversation

@renovate
Copy link
Contributor

@renovate renovate bot commented Feb 3, 2026

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package Change Age Confidence
fastify (source) 4.18.0 → 5.7.2 age confidence

GitHub Vulnerability Alerts

CVE-2026-25223

Impact

A validation bypass vulnerability exists in Fastify where request body validation schemas specified by Content-Type can be completely circumvented. By appending a tab character (\t) followed by arbitrary content to the Content-Type header, attackers can bypass body validation while the server still processes the body as the original content type.

For example, a request with Content-Type: application/json\ta will bypass JSON schema validation but still be parsed as JSON.

This vulnerability affects all Fastify users who rely on Content-Type-based body validation schemas to enforce data integrity or security constraints. The concrete impact depends on the handler implementation and the level of trust placed in the validated request body, but at the library level, this allows complete bypass of body validation for any handler using Content-Type-discriminated schemas.

This issue is a regression or missed edge case from the fix for a previously reported vulnerability.

Patches

This vulnerability has been patched in Fastify v5.7.2. All users should upgrade to this version or later immediately.

Workarounds

If upgrading is not immediately possible, user can implement a custom onRequest hook to reject requests containing tab characters in the Content-Type header:

fastify.addHook('onRequest', async (request, reply) => {
  const contentType = request.headers['content-type']
  if (contentType && contentType.includes('\t')) {
    reply.code(400).send({ error: 'Invalid Content-Type header' })
  }
})

Resources

Release Notes

fastify/fastify (fastify)

v5.7.2

Compare Source

⚠️ Notice ⚠️

Parsing of the content-type header has been improved to a strict parser in PR #​6414. This means only header values in the form described in RFC 9110 are accepted.

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.7.1...v5.7.2

v5.7.1

Compare Source

What's Changed

Full Changelog: fastify/fastify@v5.7.0...v5.7.1

v5.7.0

Compare Source

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.6.2...v5.7.0

v5.6.2

Compare Source

v5.6.1

Compare Source

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.6.0...v5.6.1

v5.6.0

Compare Source

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.5.0...v5.6.0

v5.5.0

Compare Source

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.4.0...v5.5.0

v5.4.0

Compare Source

What's Changed

Full Changelog: fastify/fastify@v5.3.3...v5.4.0

v5.3.3

Compare Source

What's Changed
New Contributors

Full Changelog: fastify/fastify@v5.3.2...v5.3.3

v5.3.2

Compare Source

⚠️ Security Release ⚠️

Unfortunately, v5.3.1 did not include a complete fix for "Invalid content-type parsing could lead to validation bypass" and CVE-2025-32442. This is a follow-up patch to cover an edge case.

What's Changed
New Contributors

Full Changelog: fastify/fastify@v5.3.1...v5.3.2

v5.3.1

Compare Source

⚠️ Security Release ⚠️
What's Changed
New Contributors

Full Changelog: fastify/fastify@v5.3.0...v5.3.1

v5.3.0

Compare Source

What's Changed
New Contributors

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

v5.2.2

Compare Source

What's Changed

Configuration

📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

  • If you want to rebase/retry this PR, check this box

This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot requested a review from a team as a code owner February 3, 2026 00:38
@renovate renovate bot added the dependencies Pull requests that update a dependency file label Feb 3, 2026
@github-actions github-actions bot added pkg:instrumentation-fastify pkg-status:unmaintained This package is unmaintained. Only bugfixes may be acceped until a new owner has been found. labels Feb 3, 2026
@renovate renovate bot force-pushed the renovate/npm-fastify-vulnerability branch from d2bc487 to 3b40bd6 Compare February 12, 2026 13:14
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

No reviews

Assignees

@trentm trentm

@dyladan dyladan

@legendecas legendecas

@pichlermarc pichlermarc

Labels

dependencies Pull requests that update a dependency file pkg:instrumentation-fastify pkg-status:unmaintained This package is unmaintained. Only bugfixes may be acceped until a new owner has been found.

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

4 participants

@trentm @dyladan @legendecas @pichlermarc