Mastodon End of Life (EOL) Dates & Support Timeline
Complete end-of-life dates, support windows, and security status for all Mastodon versions. Data sourced from endoflife.date and official vendor documentation. Updated at every deploy.
| Version | Latest Release | Release Date | EOL Date | Days | Status |
|---|---|---|---|---|---|
| 1 | 1.6.1 | Feb 5, 2017 | No EOL date | Supported | Active |
| 2 | 2.9.4 | Oct 18, 2017 | No EOL date | Supported | Active |
| 3.0 | 3.0.2 | Oct 3, 2019 | No EOL date | Supported | Active |
| 3.1 | 3.1.5 | Feb 9, 2020 | No EOL date | Supported | Active |
| 3.2 | 3.2.2 | Jul 27, 2020 | No EOL date | Supported | Active |
| 3.3 | 3.3.3 | Dec 27, 2020 | May 26, 2022 | 1489 days past EOL | EOL |
| 3.4 | 3.4.10 | May 16, 2021 | Nov 6, 2022 | 1325 days past EOL | EOL |
| 3.5 | 3.5.19 | Mar 30, 2022 | Dec 31, 2023 | 905 days past EOL | EOL |
| 4.0 | 4.0.15 | Nov 14, 2022 | Oct 31, 2023 | 966 days past EOL | EOL |
| 4.1 | 4.1.25 | Feb 10, 2023 | Apr 8, 2025 | 441 days past EOL | EOL |
| 4.2 | 4.2.29 | Sep 21, 2023 | Jan 8, 2026 | 166 days past EOL | EOL |
| 4.3 | 4.3.23 | Oct 8, 2024 | May 6, 2026 | 48 days past EOL | EOL |
| 4.4 | 4.4.18 | Jul 8, 2025 | Dec 17, 2026 | 177 days remaining | Warning |
| 4.5 | 4.5.11 | Nov 6, 2025 | TBD | Supported | Active |
| 4.6 | 4.6.0 | Jun 17, 2026 | TBD | Supported | Active |
What does Mastodon end of life mean for your organization?
When a version of Mastodon reaches end of life, the maintainers stop issuing security patches. Vulnerabilities discovered after this date are publicly disclosed on the National Vulnerability Database, exploit code appears on GitHub, and your systems remain permanently exposed.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the accumulation of unpatched vulnerabilities in EOL software. With a zero-day, nobody knows about the vulnerability. With EOL software, the vulnerability is public — listed, rated, and often weaponized — but no patch will ever exist. This is the most dangerous gap in enterprise security posture.
Organizations running EOL Mastodon should treat it as a vulnerability class in their risk register, apply compensating controls (network segmentation, enhanced monitoring, access restriction), and prioritize migration to a supported version.
Extended Support Options
If you cannot migrate immediately, extended support vendors provide continued security patches for EOL Mastodon versions. This is a bridge, not a permanent solution — plan your migration in parallel.
We work with vetted extended support vendors. Tell us what you need and we'll connect you with the right provider.
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