Skip to content

fix(deps): update dependency fastify to v5.8.3 [security]#1208

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

fix(deps): update dependency fastify to v5.8.3 [security]#1208
renovate[bot] wants to merge 1 commit intomainfrom
renovate/npm-fastify-vulnerability

Conversation

@renovate
Copy link
Copy Markdown
Contributor

@renovate renovate Bot commented Feb 2, 2026 •
edited
Loading

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package Change Age Confidence
fastify (source) 5.3.2 → 5.8.3 age confidence

Fastify Vulnerable to DoS via Unbounded Memory Allocation in sendWebStream

CVE-2026-25224 / GHSA-mrq3-vjjr-p77c

More information

Details

Impact

A Denial of Service vulnerability in Fastify’s Web Streams response handling can allow a remote client to exhaust server memory. Applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted. A slow or non-reading client can trigger unbounded buffering when backpressure is ignored, leading to process crashes or severe degradation.

Patches

The issue is fixed in Fastify 5.7.3. Users should upgrade to 5.7.3 or later.

Workarounds

Avoid sending Web Streams from Fastify responses (e.g., ReadableStream or Response bodies). Use Node.js streams (stream.Readable) or buffered payloads instead until the project can upgrade.

References

Severity

  • CVSS Score: 3.7 / 10 (Low)
  • Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

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

Fastify's Content-Type header tab character allows body validation bypass

CVE-2026-25223 / GHSA-jx2c-rxcm-jvmq

More information

Details

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

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

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

fastify: request.protocol and request.host Spoofable via X-Forwarded-Proto/Host from Untrusted Connections

CVE-2026-3635 / GHSA-444r-cwp2-x5xf

More information

Details

Summary

When trustProxy is configured with a restrictive trust function (e.g., a specific IP like trustProxy: '10.0.0.1', a subnet, a hop count, or a custom function), the request.protocol and request.host getters read X-Forwarded-Proto and X-Forwarded-Host headers from any connection — including connections from untrusted IPs. This allows an attacker connecting directly to Fastify (bypassing the proxy) to spoof both the protocol and host seen by the application.

Affected Versions

fastify <= 5.8.2

Impact

Applications using request.protocol or request.host for security decisions (HTTPS enforcement, secure cookie flags, CSRF origin checks, URL construction, host-based routing) are affected when trustProxy is configured with a restrictive trust function.

When trustProxy: true (trust everything), both host and protocol trust all forwarded headers — this is expected behavior. The vulnerability only manifests with restrictive trust configurations.

Severity

  • CVSS Score: 6.1 / 10 (Medium)
  • Vector String: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

References

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

Release Notes

fastify/fastify (fastify)

v5.8.3

Compare Source

⚠️ Security Release

This fixes CVE CVE-2026-3635 GHSA-444r-cwp2-x5xf.

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.8.2...v5.8.3

v5.8.2

Compare Source

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.8.1...v5.8.2

v5.8.1

Compare Source

⚠️ Security Release

Fixes "Missing End Anchor in "subtypeNameReg" Allows Malformed Content-Types to Pass Validation": GHSA-573f-x89g-hqp9.

CVE-2026-3419

Full Changelog: fastify/fastify@v5.8.0...v5.8.1

v5.8.0

Compare Source

What's Changed

New Contributors

Full Changelog: fastify/fastify@v5.7.4...v5.8.0

v5.7.4

Compare Source

Full Changelog: fastify/fastify@v5.7.3...v5.7.4

v5.7.3

Compare Source

⚠️ Security Release
What's Changed

Full Changelog: fastify/fastify@v5.7.2...v5.7.3

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

Configuration

📅 Schedule: (UTC)

  • Branch creation
    • ""
  • Automerge
    • At any time (no schedule defined)

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, 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.

@vercel
Copy link
Copy Markdown

vercel Bot commented Feb 2, 2026

Deployment failed with the following error:

Resource is limited - try again in 18 hours (more than 100, code: "api-deployments-free-per-day").

Learn More: https://vercel.com/itman?upgradeToPro=build-rate-limit

@codesandbox
Copy link
Copy Markdown

codesandbox Bot commented Feb 2, 2026

Review or Edit in CodeSandbox

Open the branch in Web Editor • VS Code • Insiders

Open Preview

@changeset-bot
Copy link
Copy Markdown

changeset-bot Bot commented Feb 2, 2026 •
edited
Loading

⚠️ No Changeset found

Latest commit: 127f336

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

@coderabbitai
Copy link
Copy Markdown

coderabbitai Bot commented Feb 2, 2026

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

  • 🔍 Trigger a full review

Comment @coderabbitai help to get the list of available commands and usage tips.

@what-the-diff
Copy link
Copy Markdown

what-the-diff Bot commented Feb 2, 2026

PR Summary

  • Package Version Update
    The version of the package fastify has been updated. This package is like a toolbox for our server, helping it do its job more effectively. The updated version, 5.7.3, provides enhanced features and improvements compared to the former version, 5.3.2. This could mean a variety of benefits such as better performance, more stability, or new functionalities.

ellipsis-dev[bot]
ellipsis-dev Bot reviewed Feb 2, 2026
View reviewed changes
Copy link
Copy Markdown

@ellipsis-dev ellipsis-dev Bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Important

Looks good to me! 👍

Reviewed everything up to 5454d06 in 13 seconds. Click for details.
  • Reviewed 13 lines of code in 1 files
  • Skipped 1 files when reviewing.
  • Skipped posting 0 draft comments. View those below.
  • Modify your settings and rules to customize what types of comments Ellipsis leaves. And don't forget to react with 👍 or 👎 to teach Ellipsis.

Workflow ID: wflow_Td96RDSo65U0EN5M

You can customize Ellipsis by changing your verbosity settings, reacting with 👍 or 👎, replying to comments, or adding code review rules.

@socket-security
Copy link
Copy Markdown

socket-security Bot commented Feb 2, 2026 •
edited
Loading

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff Package Supply Chain
Security		 Vulnerability Quality Maintenance License
Added@​types/​tap@​18.0.0961003950100
Added@​types/​busboy@​1.5.41001007280100
Addedfastify-tsconfig@​3.0.01001009881100
Addedtsx@​4.19.31001008185100
Addedcross-env@​7.0.310010010082100
Addedtsup@​8.4.0981009483100
Addednft.storage@​7.2.0931009584100
Addedclose-with-grace@​2.2.010010010086100
Addedfastify-plugin@​5.0.110010010087100
Added@​fastify/​sensible@​6.0.39910010087100
Addedfastify-cli@​7.4.09810010088100
Added@​fastify/​cors@​11.0.110010010088100
Added@​fastify/​autoload@​6.3.010010010088100
Addedtypescript@​5.8.31001009010090
Added@​sinclair/​typebox@​0.34.3310010010090100
Added@​fastify/​multipart@​9.0.310010010090100
Addedfast-json-stringify@​6.0.19910010091100
Addedtap@​21.1.09910010092100
Addedfastify@​5.8.39810010097100

View full report

@socket-security
Copy link
Copy Markdown

socket-security Bot commented Feb 2, 2026 •
edited
Loading

All alerts resolved. Learn more about Socket for GitHub.

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

View full report

@renovate renovate Bot force-pushed the renovate/npm-fastify-vulnerability branch from 5454d06 to 5b038d9 Compare February 12, 2026 14:48
@vercel
Copy link
Copy Markdown

vercel Bot commented Feb 12, 2026 •
edited
Loading

The latest updates on your projects. Learn more about Vercel for GitHub.

Project Deployment Actions Updated (UTC)
nft-app Error Error Mar 30, 2026 6:12pm

@renovate renovate Bot force-pushed the renovate/npm-fastify-vulnerability branch from 5b038d9 to e80189e Compare March 25, 2026 21:36
@renovate renovate Bot changed the title fix(deps): update dependency fastify to v5.7.3 [security] fix(deps): update dependency fastify to v5.8.3 [security] Mar 25, 2026
@renovate renovate Bot changed the title fix(deps): update dependency fastify to v5.8.3 [security] fix(deps): update dependency fastify to v5.8.3 [security] - autoclosed Mar 27, 2026
@renovate renovate Bot closed this Mar 27, 2026
@renovate renovate Bot deleted the renovate/npm-fastify-vulnerability branch March 27, 2026 01:26
@renovate renovate Bot changed the title fix(deps): update dependency fastify to v5.8.3 [security] - autoclosed fix(deps): update dependency fastify to v5.8.3 [security] Mar 30, 2026
@renovate renovate Bot reopened this Mar 30, 2026
@renovate renovate Bot force-pushed the renovate/npm-fastify-vulnerability branch 2 times, most recently from e80189e to 127f336 Compare March 30, 2026 18:07
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

@ellipsis-dev ellipsis-dev[bot] ellipsis-dev[bot] left review comments

@renovate-approve renovate-approve[bot] renovate-approve[bot] approved these changes

Assignees

No one assigned

Labels

None yet

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

0 participants