FastAPI 0.126 lifecycle
Current status
FastAPI 0.126 is currently in standard support.
Official lifecycle source: FastAPI PyPI releases
- Support phase
- standard support
- End of life
- Not officially published
- Latest release
- 0.126.0
- Released
- 20 Dec 2025
At a glance
- Version line
- 0.126
- Initial release
- 20 Dec 2025
- Lifecycle phase
- standard support
- Latest stable
- 0.126.0
- Latest release date
- 20 Dec 2025
- EOL
- Not officially published
- Risk
- low
- Releases tracked
- 1
Lifecycle timeline
Phases from published LifecyclePeriod records. Missing phases are not inferred.
Release
20 Dec 2025
standard supportcurrent
20 Dec 2025 → —
Source: FastAPI PyPI releases
FastAPI 0.126 is currently in standard support.
Upgrade options
Newer supported FastAPI version lines from CompatHub lifecycle data. Compatibility and security context use existing evidence only.
You are on FastAPI 0.126
Supported
Supported upgrade options
- FastAPI 0.141Upgrade planner →Supported· 15 minor versions newer
- FastAPI 0.140Upgrade planner →Supported· 14 minor versions newer
- FastAPI 0.139Upgrade planner →Supported· 13 minor versions newer
Latest release
Release history
1 concrete release tracked for this line.
| Version | Release date | Channel | Source |
|---|---|---|---|
| 0.126.0 | 20 Dec 2025 | stable | Source |
Release activity
- Total releases
- 1
- Last 30 days
- 0
- Last 90 days
- 0
- Most recent
- 20 Dec 2025
Should I use this version?
Suitable for new deployments
FastAPI 0.126 is currently supported (standard support).
Version comparison
Compact comparison against the nearest relevant release lines.
Compatibility
Evidence-backed compatibility results involving FastAPI 0.126. Only combinations CompatHub can evaluate from upstream sources are listed.
Compatible targets
Sources
Where this information comes from.
Lifecycle sources
- FastAPI PyPI releasesfirst party · high confidence
Official source: https://pypi.org/project/fastapi/
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
- FastAPI PyPI releasesfirst party · high confidence
Official source: https://pypi.org/project/fastapi/
Last verified 2 Sept 2026
Data coverage
Last checked = last successful upstream check. Latest source update = when upstream content last changed.
- Releases tracked
- 1
- 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