Fastify End of Life (EOL) Dates & Support Timeline
Complete end-of-life dates, support windows, and security status for all Fastify versions. Data sourced from endoflife.date and official vendor documentation. Updated at every deploy.
| Version | Latest Release | Release Date | EOL Date | Days | Status |
|---|---|---|---|---|---|
| 1 | 1.14.6 | Mar 6, 2018 | Sep 1, 2019 | 2518 days past EOL | EOL |
| 2 | 2.15.3 | Feb 25, 2019 | Jan 31, 2021 | 2000 days past EOL | EOL |
| 3 | 3.29.5 | Jul 7, 2020 | Jun 30, 2023 | 1120 days past EOL | EOL |
| 4 | 4.29.1 | Jun 8, 2022 | Jun 30, 2025 | 389 days past EOL | EOL |
| 5 | 5.10.0 | Sep 17, 2024 | TBD | Supported | Active |
Live EOL badge for your README — updates automatically at every build.
[](https://endoflife.ai/fastify)
Fastify lifecycle status — the real story
Fastify is one of the few Node.js frameworks with a written, dated LTS policy: each major is supported for at least six months, then receives security fixes for six months after the next major ships, with exact end dates published in the project's LTS document. Fastify 3.x ended LTS on June 30 2023 and 4.x on June 30 2025 — today only the 5.x line is maintained.
That clarity cuts both ways: the dates are unambiguous, and so is the exposure. Fastify is the performance-focused choice for high-throughput Node services (and the engine under other frameworks, including NestJS's Fastify adapter), so a pinned 3.x or 4.x dependency is a server framework past its security window, not a cosmetic lag.
The project's own LTS document notes that commercial security support for EOL Fastify versions exists through the OpenJS Foundation's Ecosystem Sustainability Program, built in consultation with Fastify core maintainers — an unusually well-credentialed extended-support path for teams that need time before the jump to 5.x.
What does Fastify end of life mean for your organization?
When a version of Fastify 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 Fastify 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 Fastify versions. This is a bridge, not a permanent solution — plan your migration in parallel.
Fastify has 4 versions past end of life — security patches have stopped, but CVE disclosures haven't. The good news: extended support for Fastify exists — vetted vendors ship security patches for years past the official date. Right now that coverage spans Fastify 3.x. Tell us where to reach you and we'll reply with matched options and pricing guidance.