Backend framework

Fastify: latest release and open vulnerabilities today

The latest release of the fastify package is 5.12.7. 5 high or critical advisories for the fastify package were published in the last 12 months; none of its advisories is on CISA’s list of exploited vulnerabilities.

Last checked against npm, OSV.dev, CISA KEV, FIRST EPSS and deps.dev.

Latest fastify release
5.12.7
npm downloads last week
15.4M
GitHub stars
37.3k
Licence
MIT
OpenSSF Scorecard
8.3 / 10

Security advisories

OSV.dev, CISA KEV and FIRST EPSS

11 advisories published in the last 12 months, 5 of them high or critical. 16 in total since records began. Checked packages: fastify.

  • HighCVE-2026-84504Published

    fastify vulnerable to request body replacement via an async validation result collision

    Fixed in 5.12.2.

    EPSS: top 65%
  • HighCVE-2026-84428Published

    fastify vulnerable to header validation bypass via incomplete schema case normalization

    Fixed in 5.12.2.

    EPSS: top 57%
  • HighCVE-2026-84469Published

    fastify vulnerable to request validation bypass via skipped boolean false schemas

    Fixed in 5.12.2.

    EPSS: top 60%
  • HighCVE-2026-76169Published

    fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers

    Fixed in 5.12.2.

    EPSS: top 57%
  • HighCVE-2026-25223Published

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

    Fixed in 5.7.2.

    EPSS: top 42%

All fastify advisories on OSV.dev

Maintenance and supply chain

OpenSSF Scorecard 8.3 / 10 (scored )

The Scorecard rates the repository’s security practices, not known vulnerabilities. Recent activity: 30 commits and 15 issue updates found in the last 90 days.

Weakest checks

  • No static analysis (SAST 3/10)

Full ScorecardSource repository

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Check Fastify in your own stack

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