Fastify 5 lifecycle
Current status
Fastify 5 has no published vendor calendar support schedule in CompatHub's sources. Release history and dependency requirements are recorded from package metadata without inventing support commitments.
Security: 4 tracked advisories affecting this line. Details below — lifecycle and vulnerability status are separate.
Official lifecycle source: Fastify npm releases
- Support phase
- unknown
- End of life
- Not officially published
- Latest release
- 5.12.1
- Released
- 18 Aug 2026
At a glance
- Version line
- 5
- Initial release
- 17 Sept 2024
- Lifecycle phase
- unknown
- Latest stable
- 5.12.1
- Latest release date
- 18 Aug 2026
- EOL
- Not officially published
- Risk
- medium
- Releases tracked
- 33
Lifecycle timeline
Phases from published LifecyclePeriod records. Missing phases are not inferred.
Release
17 Sept 2024
unknowncurrent
17 Sept 2024 → —
Source: Fastify npm releases
Fastify 5 has no published vendor calendar support schedule in CompatHub's sources. Release history and dependency requirements are recorded from package metadata without inventing support commitments.
Security
Advisories affecting Fastify 5 (OSV.dev evidence). Known exploited status, due dates, and ransomware use from CISA KEV when matched.
- Known vulnerabilities
- 4
- Known exploited
- 0
- Highest CVSS
- 5.3
- CVE-2026-18504GHSA-w2qp-rph6-63g4
fastify vulnerable to schema validation bypass via root primitive coercion mismatch
- CVSS:
- 5.3 (moderate) · NVD
- CWE:
- CWE-20
- Affected:
- <5.12.1
- Fixed in:
- 5.12.1
- Source:
- OSV source · Advisory
- CVE-2026-3635GHSA-444r-cwp2-x5xf
fastify: request.protocol and request.host Spoofable via X-Forwarded-Proto/Host from Untrusted Connections
- Affected:
- <5.8.3
- Fixed in:
- 5.8.3
- Source:
- OSV source · Advisory
- CVE-2026-25224GHSA-mrq3-vjjr-p77c
Fastify Vulnerable to DoS via Unbounded Memory Allocation in sendWebStream
- Affected:
- <5.7.3
- Fixed in:
- 5.7.3
- Source:
- OSV source · Advisory
- CVE-2026-25223GHSA-jx2c-rxcm-jvmq
Fastify's Content-Type header tab character allows body validation bypass
- Affected:
- <5.7.2
- Fixed in:
- 5.7.2
- Source:
- OSV source · Advisory
Latest release
Previous releases
5.12.0
13 Aug 2026
5.11.3
8 Aug 2026
5.11.2
3 Aug 2026
Release history
33 concrete releases tracked for this line.
Release activity
- Total releases
- 33
- Last 30 days
- 3
- Last 90 days
- 8
- Avg. interval
- ~22 days
- Most recent
- 18 Aug 2026
Should I use this version?
Lifecycle status unclear
Fastify 5 has no published vendor calendar support schedule. CompatHub does not invent support commitments from release history alone.
Version comparison
Compact comparison against the nearest relevant release lines.
Sources
Where this information comes from.
Lifecycle sources
- Fastify npm releasesfirst party · high confidence
Official source: https://www.npmjs.com/package/fastify
Last verified 2 Sept 2026
- OSV.devfirst party
Official source: https://osv.dev
Verification time not recorded
- NVD (NIST)first party
Official source: https://nvd.nist.gov
Verification time not recorded
- CISA Known Exploited Vulnerabilitiesfirst party
Official source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Verification time not recorded
Release sources
- Fastify npm releasesfirst party · high confidence
Official source: https://www.npmjs.com/package/fastify
Last verified 2 Sept 2026
Data coverage
Last checked = last successful upstream check. Latest source update = when upstream content last changed.
- Releases tracked
- 33
- Lifecycle periods
- 1
- EOL
- Not officially published
- Provenance records
- 2
- Data last checked
- 2 Sept 2026
- Latest source update
- 2 Sept 2026
EOL: Not officially published