Symfony 3.3 lifecycle
Current status
Symfony 3.3 is currently in standard support.
Official lifecycle source: Symfony GitHub Releases
- Support phase
- standard support
- End of life
- Not officially published
- Latest release
- 3.3.18
- Released
- 1 Aug 2018
At a glance
- Version line
- 3.3
- Initial release
- 29 May 2017
- Lifecycle phase
- standard support
- Latest stable
- 3.3.18
- Latest release date
- 1 Aug 2018
- EOL
- Not officially published
- Risk
- low
- Releases tracked
- 19
Lifecycle timeline
Phases from published LifecyclePeriod records. Missing phases are not inferred.
Release
29 May 2017
standard supportcurrent
29 May 2017 → —
Source: Symfony GitHub Releases
Symfony 3.3 is currently in standard support.
Latest release
Previous releases
3.3.17
25 May 2018
3.3.16
29 Jan 2018
3.3.15
5 Jan 2018
Release history
19 concrete releases tracked for this line.
| Version | Release date | Channel | Source |
|---|---|---|---|
| 3.3.18 | 1 Aug 2018 | stable | Source |
| 3.3.17 | 25 May 2018 | stable | Source |
| 3.3.16 | 29 Jan 2018 | stable | Source |
| 3.3.15 | 5 Jan 2018 | stable | Source |
| 3.3.14 | 4 Dec 2017 | stable | Source |
| 3.3.13 | 17 Nov 2017 | stable | Source |
| 3.3.12 | 13 Nov 2017 | stable | Source |
| 3.3.11 | 10 Nov 2017 | stable | Source |
| 3.3.10 | 6 Oct 2017 | stable | Source |
| 3.3.9 | 11 Sept 2017 | stable | Source |
| 3.3.8 | 28 Aug 2017 | stable | Source |
| 3.3.7 | 28 Aug 2017 | stable | Source |
| 3.3.6 | 1 Aug 2017 | stable | Source |
| 3.3.5 | 17 Jul 2017 | stable | Source |
| 3.3.4 | 5 Jul 2017 | stable | Source |
| 3.3.3 | 4 Jul 2017 | stable | Source |
| 3.3.2 | 6 Jun 2017 | stable | Source |
| 3.3.1 | 5 Jun 2017 | stable | Source |
| 3.3.0 | 29 May 2017 | stable | Source |
Release activity
- Total releases
- 19
- Last 30 days
- 0
- Last 90 days
- 0
- Avg. interval
- ~24 days
- Most recent
- 1 Aug 2018
Should I use this version?
Suitable for new deployments
Symfony 3.3 is currently supported (standard support).
Upgrade options
Newer supported Symfony version lines from CompatHub lifecycle data. Compatibility and security context use existing evidence only.
You are on Symfony 3.3
Supported
Supported upgrade options
- Symfony 8.1Upgrade planner →Supported· 5 major versions newer
- Symfony 8.0Upgrade planner →Supported· 5 major versions newer
- Symfony 7.4Upgrade planner →Supported· 4 major versions newer
Version comparison
Compact comparison against the nearest relevant release lines.
Sources
Where this information comes from.
Lifecycle sources
- Symfony GitHub Releasesfirst party · high confidence
Official source: https://api.github.com/repos/symfony/symfony/releases
Last verified 31 Aug 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
- Symfony GitHub Releasesfirst party · high confidence
Official source: https://api.github.com/repos/symfony/symfony/releases
Last verified 31 Aug 2026
- Symfony releases.jsonfirst party
Official source: https://symfony.com/releases.json
Verification time not recorded
Data coverage
Last checked = last successful upstream check. Latest source update = when upstream content last changed.
- Releases tracked
- 19
- Lifecycle periods
- 1
- EOL
- Not officially published
- Provenance records
- 2
- Data last checked
- 31 Aug 2026
- Latest source update
- 31 Aug 2026
EOL: Not officially published